Updated
Claude Fable 5 vs GPT-5.6 Sol
Claude Fable 5 (0.70) and GPT-5.6 Sol (0.73) are statistically tied on Bug Bench.
| Claude Fable 5 | GPT-5.6 Sol | |
|---|---|---|
| Bug rate | ||
| Relative bug rate(statistically tied) | 0.70 | 0.73 |
| Rank | #2 of 9 | #3 of 9 |
| By coding agent | ||
| Cursor | 0.17 | 1.56 |
| Details | ||
| Provider | Anthropic | OpenAI |
| Released | Jun 9, 2026 | Jul 9, 2026 |
| List price | $10 input / $50 output per 1M tokens | $4 input / $20 output per 1M tokens |
| Share of AI-written code, week of Sep 14 | 0.9% | 7.2% |
1.00 = average · lower is better · = statistically tied
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Questions and answers
- Which has fewer bugs, Claude Fable 5 or GPT-5.6 Sol?
- Claude Fable 5 (0.70) and GPT-5.6 Sol (0.73) are statistically tied on Bug Bench. Claude Fable 5 ranks #2 of 9 and GPT-5.6 Sol #3.
- Which is cheaper, Claude Fable 5 or GPT-5.6 Sol?
- Claude Fable 5 lists at $10 input / $50 output per 1M tokens; GPT-5.6 Sol lists at $4 input / $20 output per 1M tokens. GPT-5.6 Sol has the lower list price.
- Which is used more, Claude Fable 5 or GPT-5.6 Sol?
- GPT-5.6 Sol, with 7.2% of the AI-written code reviewed by cubic in the week of Sep 14, 2026, against 0.9% for Claude Fable 5.