- 🆕 First publicly available model from Anthropic's Mythos class
- 📏 1M-token context with up to 128K output tokens
- 🧠 Always-on adaptive thinking for long-horizon agentic work
- 👁️ Multimodal vision capabilities for reasoning over images
- 🔧 Coding, function calling, and web search built in
- 🏢 Available via the Claude API and cloud platforms
- 📚 Anthropic reports gains over Opus 4.8 on agentic coding
- 🔒 Ships with additional Mythos-class safety safeguards
Anthropic PBC is an American artificial intelligence company headquartered in San Francisco. Structured as a public benefit corporation, the lab develops large language models under the Claude name, with a research emphasis on building reliable, steerable, and safety-focused AI…
Explore 9 more models by Anthropic →Claude Fable 5 is Anthropic's most capable widely released model and the first commercially available member of its top-tier Mythos class, released in 2026.[2][3] Positioned above the Opus tier, it pairs a 1M-token context window with up to 128K output tokens, always-on adaptive thinking, and multimodal vision, and is designed for demanding reasoning and long-horizon agentic work.[2][3]
Compared with its same-family predecessor [[sibling:claude-opus-4-8|Claude Opus 4.8]] — Anthropic's previous flagship, released just weeks earlier — Fable 5 sits a tier higher and is presented as an advance on agentic coding, reasoning, and visual understanding, with always-on adaptive thinking enabling longer, asynchronous task execution.[1][2] Anthropic reports gains over Opus 4.8 on agentic coding in its announcement, though specific figures should be verified against the company's own model card.[2]
As a Mythos-class model, Fable 5 ships with additional safety safeguards, and its unrestricted counterpart, Mythos 5, is offered through more limited access channels rather than general availability.[2][3] Within Anthropic's broader lineup it succeeds the Opus generation, including [[sibling:claude-opus-4-7|Claude Opus 4.7]] and [[sibling:claude-opus-4-6|Claude Opus 4.6]], extending the family's emphasis on coding, tool use, and extended autonomous workflows.[3]
This About section is AI-generated from public sources via VeniceStats + Venice inference, with no human editing. It may contain inaccuracies.
| Seller | Reputation↓ | Input $/M | Cached $/M | Output $/M | Categories | API |
|---|---|---|---|---|---|---|
| Venice.ai Proxy 0x1f22…18c9 | 88 | $5.00 | $0.60 | $30.00 | chat,reasoning,coding,vision,multimodal,web-search | openai-chat-completions |
| Open Ant 0xe4f6…5bc4 | 83 | $9.00 | $0.90 | $45.00 | chat,coding,reasoning,writing,code,vision,multimodal | openai-chat-completions |
| Prime Seed 0x71e2…fc07 | 73 | $11.00 | $1.10 | $55.00 | coding,agentic,premium | openai-chat-completions |
| Open Bird 0xc0f1…8183 | 57 | $3.50 | $3.50 | $17.50 | chat | openai-chat-completions |
| Fire Ant 🔥🐜 0xbe05…bc5d | 45 | $3.49 | $0.31 | $17.49 | agentic,agents,chat,code,coding,creative,finance,frontier,legal,long-context,multimodal,premium,reasoning,tasks,translate,vision,web-search,writing | — |
| ▲ Apex Ant 0x73b4…e736 | 40 | $1.60 | $0.32 | $8.20 | chat,reasoning,premium,vision,multimodal,long-context,writing,agents,tasks,coding,creative,frontier,legal,finance,translate | openai-chat-completions |
| Super Seeder 0xd19f…41f3 | 3 | $9.00 | $4.50 | $45.00 | chat,tasks,reasoning,coding | openai-chat-completions |
"Best price" and the seller table are live AntSeed catalog data (advertised $/1M tokens, not settled amounts). Reputation = on-chain trust (0-100). Model knowledge (TLDR, provider, About) via the VeniceStats enrichment layer. Advertised catalog, not the model used in any specific purchase.