Anthropic sources
21 official pages from Anthropic support 15 model records in the AI model benchmarks. Official sources come from the model providers themselves: they support each model record as a whole, and no benchmark score comes from them.
Each record names the date it was last verified, its dataset version and license where Anthropic states one, what it covers and how the data uses it. Missing metadata is not filled or inferred. Every publisher is listed in the source catalog.
Anthropic 21
- Introducing Claude Opus 4.8
Covers identity, pricing · Verified 2026-08-07 · Not versioned · License not stated
Official release documentation verifies model identity, release date, the published context window, and standard input/output pricing.
- Introducing Claude Sonnet 5
Covers identity, pricing · Verified 2026-08-07 · Not versioned · License not stated
Official release documentation verifies model identity, release date, API availability, and introductory pricing through 2026-08-31.
- Claude Fable 5 and Claude Mythos 5
Covers identity, pricing · Verified 2026-08-07 · Not versioned · License not stated
Official release announcement verifies Claude Fable 5 identity, 2026-06-09 release date, API access, standard token pricing, and general availability after redeployment.
- Claude models overview
Covers identity, pricing · Verified 2026-08-07 · Not versioned · License not stated
Official current-model documentation verifies Fable's text-and-image inputs, 1,000,000-token context window, 128,000-token output limit, and current API availability.
- Claude pricing
Covers pricing · Verified 2026-08-06 · Not versioned · License not stated
Official pricing documentation used only for the exact token prices represented in model records.
- Introducing Claude Fable 5.2 and Claude Mythos 5.2
Covers identity, pricing, benchmark · Verified 2026-11-10 · Not versioned · License not stated
Published 2026-11-09. Both models cost $8 per million input and $40 per million output tokens, with an optional fast mode (up to 2.5 times faster) at $16 and $80, and generate up to 30% faster than the 5.1 models. Mythos 5.2 is available to vetted organisations through programs such as the Cyber Verification Program; Fable 5.2 blocks most cybersecurity and research biology tasks with classifiers. The benchmark table compares Fable 5.2 with Fable 5.1, Claude Opus 5.5, GPT-6 Astra and Gemini 4 Carbon; competitor figures come from their developers or benchmark leaderboards.
- Claude Fable 5.2 model overview
Covers identity, pricing · Verified 2026-11-10 · Not versioned · License not stated
Model id claude-fable-5-2 (also on Amazon Bedrock, Google Cloud and Microsoft Foundry), released 2026-11-09: 1M-token context window, 128K maximum output, text and image input, adaptive thinking always on with high as the default effort, knowledge cutoff June 2026, $8 input and $40 output per million tokens, Batch API at half price.
- Claude Mythos 5.2 model overview
Covers identity, pricing · Verified 2026-11-10 · Not versioned · License not stated
Model id claude-mythos-5-2. Available only to organisations verified through Anthropic verification programs, such as the Cyber Verification Program; the same specifications and pricing as Claude Fable 5.2: 1M-token context window, 128K maximum output, text and image input, knowledge cutoff June 2026, $8 input and $40 output per million tokens.
- Claude pricing: Fable 5.2 and Mythos 5.2
Covers pricing · Verified 2026-11-10 · Not versioned · License not stated
Read 2026-11-10. Claude Fable 5.2 and Claude Mythos 5.2: $8 input, $40 output, $10 for 5-minute cache writes, $16 for 1-hour cache writes and $0.20 for cache hits per million tokens (cache hits at 0.025x input, as on the 5.1 models); Batch API $4 input and $20 output; fast mode $16 input and $80 output.
- Claude Fable 5.1 model overview
Covers identity · Verified 2026-11-11 · Not versioned · License not stated
Status Active (legacy), retirement not sooner than September 1, 2027.
- Claude Fable 5 model overview
Covers identity · Verified 2026-11-11 · Not versioned · License not stated
Status Active (legacy), retirement not sooner than June 9, 2027.
- Claude Opus 5 model overview
Covers identity · Verified 2026-11-11 · Not versioned · License not stated
Status Active (legacy), retirement not sooner than July 24, 2027.
- Claude Sonnet 5 model overview
Covers identity · Verified 2026-11-11 · Not versioned · License not stated
Status Active (legacy), retirement not sooner than June 30, 2027.
- Claude Opus 4.8 model overview
Covers identity · Verified 2026-11-11 · Not versioned · License not stated
Status Active (legacy), retirement not sooner than May 28, 2027.
The 3 records below: First-party provider documentation used only for the stated model identity, capabilities, lifecycle, access, and pricing.
- Claude API pricing
Covers pricing · Verified 2026-10-11 · Not versioned · License not stated
- Claude models overview
Covers identity · Verified 2026-10-11 · Not versioned · License not stated
- Claude Mythos limited availability
Covers identity · Verified 2026-09-09 · Not versioned · License not stated
The 2 records below: Official provider documentation used to verify model identity and release details.
- Introducing the next generation of Claude
Covers identity, pricing · Verified 2026-08-06 · Not versioned · License not stated
- Claude 3.7 Sonnet and Claude Code
Covers identity · Verified 2026-08-06 · Not versioned · License not stated
The 2 records below: Official provider documentation used to verify exact model specifications.
- Claude 3 Haiku
Covers identity · Verified 2026-08-06 · Not versioned · License not stated
- Claude models overview
Covers identity · Verified 2026-08-06 · Not versioned · License not stated