Fable 5
#122 in Frontier LLMsFable Ai · v5 · 2× · last seen Sep 24, 2026
16
Momentum
Claude Fable 5 is a proprietary Frontier language model from Anthropic, first released on June 9, 2026. It is a "Mythos-class" model that has been secured for general use and, according to Anthropic, achieves state-of-the-art results on nearly all tested Benchmarks in software development, knowledge work, Vision, and scientific research. The model is available through the Claude API, Claude.ai, Amazon Bedrock, Google Cloud, and Microsoft Foundry, offers a context window of 1 Million Token, and is priced at $10 per Million Input-Token and $50 per Million Output-Token. A direct successor, Claude Fable 5.1, was released on September 1, 2026.
Momentum trend
30.06.28.09.
Features
| Key Benchmark (%) | SWE-bench Verified: 95.0% (independently confirmed by vals.ai) |
| Context Window (Tokens) | 1 million tokens |
| License | Proprietary (commercial API access under Anthropic terms of service; not open-weight) |
| Multimodality | Text and image input, text output, with state-of-the-art vision capabilities (e.g. chart/table analysis) |
| Platform | Claude API, Claude.ai, Claude Platform, Amazon Bedrock, Google Cloud, Microsoft Foundry |
| Price per 1M Tokens | $10 (input) / $50 (output) |
| Release Date | June 9, 2026 |