Unknown · 20× · vu le 17 août 2026
39
Momentum
Fable (officially "Claude Fable 5") is Anthropic's first generally available model of the new "Mythos" class, positioned above Opus 4.8. It is designed for Frontier-Reasoning, long-running agentic tasks, coding, knowledge work, and vision, and is offered via the Claude API as well as AWS, Google Cloud, and Microsoft Foundry. The model features a 1-million-Token context window as standard, up to 128k output Tokens per request, and achieves top performance on SWE-Bench Pro among tested Frontier models. Additional safety classifiers can decline certain requests or route them to Opus 4.8.
Historique du momentum
20.05.18.08.
Fonctionnalités
| Key Benchmark (%) | SWE-Bench Pro: 80.3%; SWE-bench Verified: 95.5% |
| Context Window (Tokens) | 1,000,000 tokens (default), up to 128,000 output tokens per request |
| License | Proprietary, closed model (not open-weight) |
| Multimodality | Text, image, and file input (vision), text output, tool use, up to 600 images/PDF pages per request |
| Platform | Claude API, Amazon Bedrock, Claude Platform on AWS, Google Cloud, Microsoft Foundry |
| Price per 1M Tokens | $10 input / $50 output (cache hit $1, Batch API $5/$25) |
| Release Date | June 9, 2026 (temporarily suspended June 12, restored globally July 1, 2026) |