Anthropic's most capable model for demanding reasoning and long-horizon agentic work, extending Claude Fable 5 with stronger agentic coding, multistep research, and document work.
LLM Gateway routes requests to the best providers that are able to handle your prompt size and parameters.
Anthropic's most capable model for demanding reasoning and long-horizon agentic work, extending Claude Fable 5 with stronger agentic coding, multistep research, and document work. You can access it through LLM Gateway's OpenAI-compatible API with automatic provider routing, fallback, and cost analytics.
Pricing for Claude Fable 5.1 on LLM Gateway starts at $10.00 per million input tokens and $50.00 per million output tokens, depending on the provider. The pricing table above always reflects the current per-provider rates.
Claude Fable 5.1 supports a context window of up to 1,000,000 tokens on its largest provider deployment.
Claude Fable 5.1 is served by Anthropic through LLM Gateway. Requests are automatically routed to the best available provider, with fallback when a provider has issues.
Yes. Claude Fable 5.1 supports both tool (function) calling and strict JSON output schema (upstream-enforced) through LLM Gateway.
Claude Fable 5.1 was released on September 1, 2026.
Claude Opus 5
1,000,000 context$5.00 in / $25.00 out per 1M
Claude Sonnet 5
1,000,000 context$2.00 in / $10.00 out per 1M
Claude Fable 5
1,000,000 context$10.00 in / $50.00 out per 1M
Claude Opus 4.8
1,000,000 context$5.00 in / $25.00 out per 1M
Claude Opus 4.7
1,000,000 context$5.00 in / $25.00 out per 1M
Claude Sonnet 4.6
1,000,000 context$3.00 in / $15.00 out per 1M