Claude Fable 5.2
Point upgrade to Claude Fable 5.1 from Anthropic, with gains in coding, reasoning, and vision. Same 1M context, at a lower rack rate than Fable 5.1.
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Context
1M
Weights
Closed
API only
Input
$8
/1M tok
Output
$40
/1M tok
Cache read
$0.20
0.02x input
Cache write
$10
1.25x input
Price & speed via Artificial Analysis · ranked across tracked models · caching via OpenRouter
| Reasoning effort | Index |
|---|---|
| max | 64.6 |
| xhigh | 62.2 |
| high | 61.8 |
| medium | 56.4 |
| low | 53.9 |
Intelligence Index per reasoning-effort setting, via Artificial Analysis · pricing identical across tiers
Reported on 3 evals across 3 domains - best 100.0% on ProofBench · #1 of 79