Claude Fable 5.1 improves on Claude Fable 5 across the board, with the biggest gains in agentic coding, long-running agentic workflows, and knowledge work: long code refactors, front-end and visual...
Specifications
| Provider | Anthropic |
|---|---|
| Intelligence Index | 53.4 (Artificial Analysis) |
| Context window | 1,000,000 tokens (1M) |
| Input price | $10 / 1M tokens |
| Output price | $50 / 1M tokens |
| Input modalities | text, image, file |
| Output modalities | text |
| Model ID | anthropic/claude-fable-5.1 |
Pricing is per 1M tokens, indicative pricing via OpenRouter (updated 2026-09-14); a provider's own list price may differ. Intelligence Index via Artificial Analysis.
Frequently asked questions
How capable is Claude Fable 5.1?
Claude Fable 5.1 scores 53.4 on the Artificial Analysis Intelligence Index, an aggregate of reasoning, knowledge, coding, and math benchmarks (higher is better). Compare it head-to-head with other models on the comparison pages below, or run it against them directly on Vincony.
How much does Claude Fable 5.1 cost?
Indicative pricing (via OpenRouter, updated 2026-09-14) is $10 per 1M input tokens and $50 per 1M output tokens. A provider's own list price may differ. On Vincony, Claude Fable 5.1 is available on credit-based pricing alongside 800+ other models.
What is Claude Fable 5.1's context window?
Claude Fable 5.1 supports a context window of up to 1,000,000 tokens (1M), which is how much text it can consider at once.
Who makes Claude Fable 5.1?
Claude Fable 5.1 is built by Anthropic. You can access it — and compare it against other providers' models — through Vincony's multi-model platform.
How do I use Claude Fable 5.1?
You can use Claude Fable 5.1 directly through Anthropic, or via Vincony, which aggregates 800+ models (including Claude Fable 5.1) into one interface with side-by-side comparison and credit-based pricing.