Claude Fable 5.1
| Maker | Anthropic |
|---|---|
| Family | Claude Fable |
| Released | 2026-09-01 |
| Context | 1M |
| Max output | 128K |
| Open weights | Closed |
|---|---|
| Modalities | text, image, pdf → text |
| Input / 1M | $10.00 |
| Output / 1M | $50.00 |
| Cached input / 1M | $0.25 |
| Review call | $0.3829 |
|---|---|
| Reasoning efforts | low, medium, high, xhigh, max |
| Hosts | Anthropic, OpenRouter |
| Model id | claude-fable-5-1 |
CodePanel's benchmark has not run Claude Fable 5.1 as a pull-request reviewer yet, so this page has no recall, false-alarm or measured-cost figures for it. The methodology explains how ranked models are scored.
No Claude Fable model is ranked yet. Of Anthropic's ranked models, Claude Opus 5.5 is the closest in list price; it caught 90% [81%–97%] of the known bugs at rank 1 of 17, with a measured review cost of $0.1525. At list price, a typical review call (26.2K tokens in and 2.4K out) costs $0.3829 on Claude Fable 5.1 and $0.1532 on Claude Opus 5.5, so this model's call is 2.5× the cost of that one's.
| Host | Model id | Input / 1M | Output / 1M |
|---|---|---|---|
| Anthropic | claude-fable-5-1 | $10.00 | $50.00 |
Source: Anthropic pricing, Oct 16, 2026
| Version | Released | Input / 1M | Output / 1M | Context |
|---|---|---|---|---|
| Claude Fable 5 | 2026-06-09 | $10.00 | $50.00 | 1M |
| Model | Maker | Input / 1M | Output / 1M | Review call | Context | Bugs caught |
|---|---|---|---|---|---|---|
| GPT-6 Astra | OpenAI | $10.00 | $50.00 | $0.3829 | 1.1M | – |
| GPT-5.5 | OpenAI | $5.00 | $30.00 | $0.2035 | 1.1M | – |
| GPT-5.6 Sol | OpenAI | $4.00 | $20.00 | $0.1532 | 1.1M | 72% |
Updated Oct 23, 2026