{
  "meta": {
    "api_version": "v1",
    "endpoint": "/api/v1/changes",
    "lifecycle_updated": "2026-07-27",
    "total": 57,
    "offset": 0,
    "limit": 50,
    "returned": 50,
    "provenance": "Combines append-only history snapshots with dated deprecation announcements from the sourced lifecycle record; source_layer identifies the origin."
  },
  "data": [
    {
      "source_layer": "history",
      "provider": "OpenAI",
      "date": "2026-07-13",
      "model_id": "gpt-5-6",
      "model_name": "GPT-5.6 Sol",
      "event": "context_change",
      "pricing": {
        "input_per_million": 5,
        "output_per_million": 30
      },
      "context_max_tokens": 1050000,
      "benchmarks": {
        "swe_bench_verified": 89.8,
        "gpqa_diamond": 91.2
      },
      "note": "OpenAI API changelog confirms GPT-5.6 Sol/Terra/Luna general availability on 2026-07-09. Live models page lists Sol at 1.05M context and 128K max output; pricing page lists $5/$30 standard short-context pricing. Source: developers.openai.com/api/docs/changelog, /models, /pricing (verified 2026-07-13)."
    },
    {
      "source_layer": "history",
      "provider": "xAI",
      "date": "2026-07-13",
      "model_id": "grok-4-5",
      "model_name": "Grok 4.5",
      "event": "model_added",
      "pricing": {
        "input_per_million": 2,
        "output_per_million": 6
      },
      "context_max_tokens": 500000,
      "note": "xAI release notes list Grok 4.5 on July 8, 2026; live models/pricing pages list 500K context and $2/$6 per 1M with $0.50 cached input. Source: docs.x.ai/developers/release-notes, /models, /pricing."
    },
    {
      "source_layer": "history",
      "provider": "Z.AI",
      "date": "2026-07-13",
      "model_id": "glm-5-2",
      "model_name": "GLM-5.2",
      "event": "model_added",
      "pricing": {
        "input_per_million": 1.4,
        "output_per_million": 4.4
      },
      "context_max_tokens": 1000000,
      "note": "Z.AI release notes list GLM-5.2 on June 16, 2026; model docs list 1M context and 128K max output; pricing page lists $1.40/$4.40 per 1M and $0.26 cached input. Source: docs.z.ai."
    },
    {
      "source_layer": "history",
      "provider": "MiniMax",
      "date": "2026-07-13",
      "model_id": "minimax-m3",
      "model_name": "MiniMax M3",
      "event": "model_added",
      "pricing": {
        "input_per_million": 0.3,
        "output_per_million": 1.2
      },
      "context_max_tokens": 1000000,
      "note": "MiniMax release notes list MiniMax-M3 on June 1, 2026; text-generation docs list 1M context; pricing page lists permanent 50% off standard pricing at $0.30/$1.20 per 1M up to 512K input, with higher long-context and priority tiers. Source: platform.minimax.io docs."
    },
    {
      "source_layer": "history",
      "provider": "OpenAI",
      "date": "2026-07-09",
      "model_id": "gpt-5-6",
      "model_name": "GPT-5.6",
      "event": "new_model",
      "pricing": {
        "input_per_million": 5,
        "output_per_million": 30
      },
      "context_max_tokens": 1100000,
      "note": "OpenAI's GPT-5.6 series (Sol/Terra/Luna) reached general availability July 9, 2026 after a restricted partner preview. Source: openai.com/index/previewing-gpt-5-6-sol"
    },
    {
      "source_layer": "history",
      "provider": null,
      "date": "2026-07-08",
      "model_id": "gemini-3-5-pro",
      "event": "correction",
      "note": "RETRACTION: benchr's 2026-06-30 entry for 'Gemini 3.5 Pro' was published in error. Independent adversarial re-verification on 2026-07-08 found no official Google source confirms this model has launched: both URLs benchr originally cited as sources (blog.google and deepmind.google model-card pages) return 404, Google's live Gemini API pricing/models pages still list Gemini 3.1 Pro as the flagship, and DeepMind's own model hub lists 'Gemini 3.5 Pro' with status 'coming soon.' The review, pricing page, and model-data entries have been removed. This correction entry is appended, not substituted for the original, per benchr's append-only history policy — the record shows the error and its correction rather than erasing either."
    },
    {
      "source_layer": "history",
      "provider": "OpenAI",
      "date": "2026-07-08",
      "model_id": "gpt-5-6",
      "event": "correction",
      "note": "CORRECTION: benchr's 2026-07-01 entry describing GPT-5.6 as having reached general availability was incorrect. Re-verification against OpenAI's own developer docs on 2026-07-08 found GPT-5.6 remains in restricted partner preview (since 2026-06-26); developers.openai.com/api/docs/models still reads 'available to select trusted partners in preview.' Independent reporting and a same-day Axios/CNBC report on eased US government restrictions point to general availability being targeted for 2026-07-09, but this had not been confirmed by OpenAI itself as of this correction. Pricing figures in the original entries are accurate and unaffected."
    },
    {
      "source_layer": "history",
      "provider": "Anthropic",
      "date": "2026-07-08",
      "model_id": "claude-sonnet-5",
      "event": "correction",
      "note": "CORRECTION: Claude Sonnet 5's max output is 128,000 tokens, not 200,000 as recorded in the 2026-07-01 entry. Re-confirmed 2026-07-08 against platform.claude.com's Models Overview table and the official 'What's New in Sonnet 5' page. Pricing from the 2026-07-03 correction is unaffected."
    },
    {
      "source_layer": "history",
      "provider": "Anthropic",
      "date": "2026-07-03",
      "model_id": "claude-sonnet-5",
      "model_name": "Claude Sonnet 5",
      "event": "price_change",
      "pricing": {
        "input_per_million": 2,
        "output_per_million": 10
      },
      "note": "Correction after live re-read of Anthropic's official pricing page: Claude Sonnet 5 launches with introductory API pricing of $2 input / $10 output per 1M tokens through August 31, 2026, then $3/$15 from September 1, 2026. Previous benchr July 1 entry incorrectly recorded $4/$20. Source: platform.claude.com/docs/en/about-claude/pricing"
    },
    {
      "source_layer": "history",
      "provider": "Anthropic",
      "date": "2026-07-01",
      "model_id": "claude-sonnet-5",
      "model_name": "Claude Sonnet 5",
      "event": "new_model",
      "pricing": {
        "input_per_million": 4,
        "output_per_million": 20
      },
      "context_max_tokens": 1000000,
      "note": "Released July 1, 2026. Anthropic's second Mythos-class-architecture model after Fable 5, priced mid-tier between Sonnet 4.6 and Opus 4.8; 128,000-token max output. Safety-classified requests return an explicit refusal; another-model retry requires configured application logic. Shipped the same day Anthropic restored Claude Fable 5 to all customers. Source: anthropic.com/news/claude-sonnet-5"
    },
    {
      "source_layer": "history",
      "provider": null,
      "date": "2026-06-30",
      "model_id": "gemini-3-5-pro",
      "model_name": "Gemini 3.5 Pro",
      "event": "new_model",
      "pricing": {
        "input_per_million": 2.5,
        "output_per_million": 15
      },
      "context_max_tokens": 2000000,
      "note": "Released June 30, 2026, just inside Google's June 2026 I/O promise. Industry-first 2,000,000-token context at the frontier tier; new highs for the Gemini family on ARC-AGI-2 (80.0) and GPQA Diamond (95.5). Source: blog.google"
    },
    {
      "date": "2026-06-29",
      "model_id": "claude-opus-4-7-fast-mode",
      "model_name": "Claude Opus 4.7 fast mode",
      "provider": "Anthropic",
      "event": "deprecation_announced",
      "lifecycle_status": "retired",
      "shutdown": "2026-07-24",
      "replacement_official": {
        "name": "Claude Opus 4.8 fast mode or Claude Opus 4.7 standard mode",
        "api_id": "claude-opus-4-8 with speed: fast"
      },
      "source": "https://platform.claude.com/docs/en/about-claude/pricing",
      "verified": "2026-07-27",
      "source_layer": "deprecations"
    },
    {
      "date": "2026-06-11",
      "model_id": "openai-gpt5-o3-snapshots-dec-2026",
      "model_name": "Older GPT-5 and o3 model snapshots",
      "provider": "OpenAI",
      "event": "deprecation_announced",
      "lifecycle_status": "deprecated",
      "shutdown": "2026-12-11",
      "replacement_official": {
        "name": "GPT-5.5 / GPT-5.4 mini / GPT-5.4 nano / GPT-5.5 Pro",
        "api_id": "gpt-5.5"
      },
      "source": "https://developers.openai.com/api/docs/deprecations",
      "verified": "2026-06-23",
      "source_layer": "deprecations"
    },
    {
      "source_layer": "history",
      "provider": "Anthropic",
      "date": "2026-06-10",
      "model_id": "claude-fable-5",
      "model_name": "Claude Fable 5",
      "event": "new_model",
      "pricing": {
        "input_per_million": 10,
        "output_per_million": 50
      },
      "context_max_tokens": 1000000,
      "note": "Released June 9, 2026. Mythos-class and generally available; safety-classified cyber/bio/distillation requests return an explicit refusal, and another-model retry requires configured application logic. Suspended June 12 and restored globally July 1, 2026. Source: anthropic.com/news/claude-fable-5-mythos-5"
    },
    {
      "source_layer": "history",
      "provider": "OpenAI",
      "date": "2026-06-10",
      "model_id": "gpt-5-4",
      "model_name": "GPT-5.4",
      "event": "new_model",
      "pricing": {
        "input_per_million": 2.5,
        "output_per_million": 15
      },
      "context_max_tokens": 1000000,
      "note": "Re-added after verification. Released March 5, 2026; wrongly removed June 1 as 'unverified'. Source: openai.com/api/pricing"
    },
    {
      "date": "2026-06-05",
      "model_id": "claude-opus-4-1",
      "model_name": "Claude Opus 4.1",
      "provider": "Anthropic",
      "event": "deprecation_announced",
      "lifecycle_status": "deprecated",
      "shutdown": "2026-08-05",
      "replacement_official": {
        "name": "Claude Opus 4.8",
        "api_id": "claude-opus-4-8"
      },
      "source": "https://platform.claude.com/docs/en/about-claude/model-deprecations",
      "verified": "2026-06-12",
      "source_layer": "deprecations"
    },
    {
      "date": "2026-06-03",
      "model_id": "openai-prompts-api",
      "model_name": "OpenAI Reusable Prompts API",
      "provider": "OpenAI",
      "event": "deprecation_announced",
      "lifecycle_status": "deprecated",
      "shutdown": "2026-11-30",
      "replacement_official": null,
      "source": "https://developers.openai.com/api/docs/deprecations",
      "verified": "2026-06-12",
      "source_layer": "deprecations"
    },
    {
      "date": "2026-06-03",
      "model_id": "openai-evals-platform",
      "model_name": "OpenAI Evals platform (dashboard + API)",
      "provider": "OpenAI",
      "event": "deprecation_announced",
      "lifecycle_status": "deprecated",
      "shutdown": "2026-11-30",
      "replacement_official": null,
      "source": "https://developers.openai.com/api/docs/deprecations",
      "verified": "2026-06-12",
      "source_layer": "deprecations"
    },
    {
      "date": "2026-06-03",
      "model_id": "openai-agent-builder",
      "model_name": "OpenAI Agent Builder",
      "provider": "OpenAI",
      "event": "deprecation_announced",
      "lifecycle_status": "deprecated",
      "shutdown": "2026-11-30",
      "replacement_official": {
        "name": "Agents SDK",
        "api_id": null
      },
      "source": "https://developers.openai.com/api/docs/deprecations",
      "verified": "2026-06-12",
      "source_layer": "deprecations"
    },
    {
      "date": "2026-06-02",
      "model_id": "gpt-image-1",
      "model_name": "GPT Image 1 mini and 1.5",
      "provider": "OpenAI",
      "event": "deprecation_announced",
      "lifecycle_status": "deprecated",
      "shutdown": "2026-12-01",
      "replacement_official": {
        "name": "GPT Image 2",
        "api_id": "gpt-image-2"
      },
      "source": "https://developers.openai.com/api/docs/deprecations",
      "verified": "2026-06-12",
      "source_layer": "deprecations"
    },
    {
      "source_layer": "history",
      "provider": "Anthropic",
      "date": "2026-06-01",
      "model_id": "claude-opus-4-8",
      "model_name": "Claude Opus 4.8",
      "event": "new_model",
      "pricing": {
        "input_per_million": 5,
        "output_per_million": 25
      },
      "context_max_tokens": 1000000,
      "note": "Claude Opus 4.8 launched May 28, 2026. $5/$25 standard; $10/$50 fast mode. SWE-Bench Pro 69.2%. 1M context window confirmed on platform.claude.com. Source: anthropic.com/news"
    },
    {
      "source_layer": "history",
      "provider": "OpenAI",
      "date": "2026-06-01",
      "model_id": "gpt-5-5",
      "model_name": "GPT-5.5",
      "event": "new_model",
      "pricing": {
        "input_per_million": 5,
        "output_per_million": 30
      },
      "context_max_tokens": 1048576,
      "note": "GPT-5.5 launched April 24, 2026. $5/$30 standard; $2.50/$15 batch. Source: openai.com/pricing"
    },
    {
      "source_layer": "history",
      "provider": "OpenAI",
      "date": "2026-06-01",
      "model_id": "gpt-5",
      "model_name": "GPT-5",
      "event": "new_model",
      "pricing": {
        "input_per_million": 1.25,
        "output_per_million": 10
      },
      "context_max_tokens": 400000,
      "note": "GPT-5 launched August 7, 2025. $1.25/$10. Source: openai.com/pricing"
    },
    {
      "source_layer": "history",
      "provider": "OpenAI",
      "date": "2026-06-01",
      "model_id": "gpt-5-mini",
      "model_name": "GPT-5 Mini",
      "event": "new_model",
      "pricing": {
        "input_per_million": 0.25,
        "output_per_million": 2
      },
      "note": "GPT-5 Mini — $0.25/$2.00. Cached input $0.025. Source: openai.com/pricing"
    },
    {
      "source_layer": "history",
      "provider": "Google",
      "date": "2026-06-01",
      "model_id": "gemini-3-5-flash",
      "model_name": "Gemini 3.5 Flash",
      "event": "new_model",
      "pricing": {
        "input_per_million": 1.5,
        "output_per_million": 9
      },
      "context_max_tokens": 1048576,
      "note": "Gemini 3.5 Flash GA since May 19, 2026 (Google I/O). $1.50/$9.00. Source: ai.google.dev/pricing"
    },
    {
      "source_layer": "history",
      "provider": "xAI",
      "date": "2026-06-01",
      "model_id": "grok-4-3",
      "model_name": "Grok 4.3",
      "event": "new_model",
      "pricing": {
        "input_per_million": 1.25,
        "output_per_million": 2.5
      },
      "context_max_tokens": 1000000,
      "note": "Grok 4.3 — $1.25/$2.50; cached $0.20. Source: x.ai/api"
    },
    {
      "source_layer": "history",
      "provider": "DeepSeek",
      "date": "2026-06-01",
      "model_id": "deepseek-v4-pro",
      "model_name": "DeepSeek V4-Pro",
      "event": "new_model",
      "pricing": {
        "input_per_million": 0.435,
        "output_per_million": 0.87
      },
      "context_max_tokens": 1000000,
      "note": "DeepSeek V4-Pro launched April 24, 2026. MIT license. Source: api-docs.deepseek.com/quick_start/pricing"
    },
    {
      "source_layer": "history",
      "provider": "DeepSeek",
      "date": "2026-06-01",
      "model_id": "deepseek-v4-flash",
      "model_name": "DeepSeek V4-Flash",
      "event": "new_model",
      "pricing": {
        "input_per_million": 0.14,
        "output_per_million": 0.28
      },
      "context_max_tokens": 1000000,
      "note": "DeepSeek V4-Flash launched April 24, 2026. MIT license. Cheapest commercial API in this set. Source: api-docs.deepseek.com"
    },
    {
      "source_layer": "history",
      "provider": "Moonshot AI",
      "date": "2026-06-01",
      "model_id": "kimi-k2-6",
      "model_name": "Kimi K2.6",
      "event": "new_model",
      "pricing": {
        "input_per_million": 0.95,
        "output_per_million": 4
      },
      "context_max_tokens": 262144,
      "note": "Kimi K2.6 released April 20, 2026. Modified MIT. Source: platform.moonshot.ai/docs/pricing"
    },
    {
      "source_layer": "history",
      "provider": "Mistral",
      "date": "2026-06-01",
      "model_id": "mistral-large-3",
      "model_name": "Mistral Large 3",
      "event": "new_model",
      "pricing": {
        "input_per_million": 0.5,
        "output_per_million": 1.5
      },
      "context_max_tokens": 256000,
      "note": "Mistral Large 3 released December 2, 2025. Apache 2.0. API id: mistral-large-2512. Source: mistral.ai/technology/models"
    },
    {
      "source_layer": "history",
      "provider": "Meta",
      "date": "2026-06-01",
      "model_id": "llama-4-maverick",
      "model_name": "Llama 4 Maverick",
      "event": "new_model",
      "pricing": null,
      "context_max_tokens": 1000000,
      "note": "Llama 4 Maverick released April 5, 2025. Community License. Self-hosted, no API fee. Source: ai.meta.com/llama"
    },
    {
      "source_layer": "history",
      "provider": "Meta",
      "date": "2026-06-01",
      "model_id": "llama-4-scout",
      "model_name": "Llama 4 Scout",
      "event": "new_model",
      "pricing": null,
      "context_max_tokens": 10000000,
      "note": "Llama 4 Scout released April 5, 2025. Community License. 10M token context. Self-hosted. Source: ai.meta.com/llama"
    },
    {
      "date": "2026-05-08",
      "model_id": "gpt-5-2-5-3-chat-snapshots",
      "model_name": "GPT-5.2 / 5.3 chat-latest snapshots",
      "provider": "OpenAI",
      "event": "deprecation_announced",
      "lifecycle_status": "deprecated",
      "shutdown": "2026-08-10",
      "replacement_official": {
        "name": "GPT-5.6 Sol",
        "api_id": "gpt-5.6-sol"
      },
      "source": "https://developers.openai.com/api/docs/deprecations",
      "verified": "2026-07-27",
      "source_layer": "deprecations"
    },
    {
      "date": "2026-04-22",
      "model_id": "gpt-4o",
      "model_name": "GPT-4o",
      "provider": "OpenAI",
      "event": "deprecation_announced",
      "lifecycle_status": "deprecated",
      "shutdown": "2026-10-23",
      "replacement_official": {
        "name": "GPT-5.5",
        "api_id": "gpt-5.5"
      },
      "source": "https://developers.openai.com/api/docs/deprecations",
      "verified": "2026-06-12",
      "source_layer": "deprecations"
    },
    {
      "date": "2026-04-22",
      "model_id": "gpt-4-0613",
      "model_name": "GPT-4",
      "provider": "OpenAI",
      "event": "deprecation_announced",
      "lifecycle_status": "deprecated",
      "shutdown": "2026-10-23",
      "replacement_official": {
        "name": "GPT-5.5",
        "api_id": "gpt-5.5"
      },
      "source": "https://developers.openai.com/api/docs/deprecations",
      "verified": "2026-06-12",
      "source_layer": "deprecations"
    },
    {
      "date": "2026-04-22",
      "model_id": "gpt-4-turbo",
      "model_name": "GPT-4 Turbo",
      "provider": "OpenAI",
      "event": "deprecation_announced",
      "lifecycle_status": "deprecated",
      "shutdown": "2026-10-23",
      "replacement_official": {
        "name": "GPT-5.5",
        "api_id": "gpt-5.5"
      },
      "source": "https://developers.openai.com/api/docs/deprecations",
      "verified": "2026-06-12",
      "source_layer": "deprecations"
    },
    {
      "date": "2026-04-22",
      "model_id": "gpt-3-5-turbo",
      "model_name": "GPT-3.5 Turbo",
      "provider": "OpenAI",
      "event": "deprecation_announced",
      "lifecycle_status": "deprecated",
      "shutdown": "2026-10-23",
      "replacement_official": {
        "name": "GPT-5.4 mini",
        "api_id": "gpt-5.4-mini"
      },
      "source": "https://developers.openai.com/api/docs/deprecations",
      "verified": "2026-06-12",
      "source_layer": "deprecations"
    },
    {
      "date": "2026-04-22",
      "model_id": "o1",
      "model_name": "o1",
      "provider": "OpenAI",
      "event": "deprecation_announced",
      "lifecycle_status": "deprecated",
      "shutdown": "2026-10-23",
      "replacement_official": {
        "name": "GPT-5.5",
        "api_id": "gpt-5.5"
      },
      "source": "https://developers.openai.com/api/docs/deprecations",
      "verified": "2026-06-12",
      "source_layer": "deprecations"
    },
    {
      "date": "2026-04-22",
      "model_id": "o1-pro",
      "model_name": "o1-pro",
      "provider": "OpenAI",
      "event": "deprecation_announced",
      "lifecycle_status": "deprecated",
      "shutdown": "2026-10-23",
      "replacement_official": {
        "name": "GPT-5.5 Pro",
        "api_id": "gpt-5.5-pro"
      },
      "source": "https://developers.openai.com/api/docs/deprecations",
      "verified": "2026-06-12",
      "source_layer": "deprecations"
    },
    {
      "date": "2026-04-22",
      "model_id": "o3-mini",
      "model_name": "o3-mini",
      "provider": "OpenAI",
      "event": "deprecation_announced",
      "lifecycle_status": "deprecated",
      "shutdown": "2026-10-23",
      "replacement_official": {
        "name": "GPT-5.5",
        "api_id": "gpt-5.5"
      },
      "source": "https://developers.openai.com/api/docs/deprecations",
      "verified": "2026-06-12",
      "source_layer": "deprecations"
    },
    {
      "date": "2026-04-22",
      "model_id": "o4-mini",
      "model_name": "o4-mini",
      "provider": "OpenAI",
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