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| Attribute | Claude Fable 5.2claude-fable-5.2 | S1s1 |
|---|---|---|
| Pricing | ||
| Input | $8.00 / 1M | — Not priced per input token |
| Output | $40.00 / 1M | — Not priced per output token |
| Cache Write (5m) | $10.00 / 1M | Not applicable |
| Cache Write (1h) | $16.00 / 1M | Not applicable |
| Cache Read | $0.20 / 1M | Not applicable |
| Web Search | $0 / 1M | $0 / 1M |
| Context | ||
| Max context | 1M | N/A |
| Max output | N/A | N/A |
| Capabilities | ||
| Vision | Yes | No |
| Function Calling | Yes | No |
| JSON Mode | Yes | No |
| Streaming | Yes | No |
| Catalogue | ||
| Provider | Anthropic | Fish Audio |
| Category | chat | voice |
| Charge type | Pay As You Go | Pay As You Go |
| Released | — | 2026-07-29 |
| Description | ||
| Summary | Claude Fable 5.2 is Anthropic's most capable model for advanced technical work and open-ended problem solving, delivering significant improvements in coding, reasoning, and vision over Fable 5.1. It excels at exceptionally complex tasks, including large-scale software migrations, electronic system design, and advanced scientific and mathematical research. With up to 30% faster output generation, clearer communication, and always-on adaptive extended thinking, Fable 5.2 supports configurable reasoning effort from low to max (default high), with thinking preserved across turns. Designed for frontier engineering, scientific discovery, and ambitious long-horizon agentic workflows, it complements Opus 5.5 as a specialized option for the most demanding technical challenges. | Fish Audio S1 text-to-speech. Billed per UTF-8 byte of input text. |