Claude Fable 5.1 vs GPT-5.4 Nano
| Claude Fable 5.1 | GPT-5.4 Nano | |
|---|---|---|
| Coding index | 84.2 | 44.8 |
| Benchmarks behind it | Verified, 5 benchmarks | Partial, 2 benchmarks |
| Output $/Mtok | $50.00 | $1.25 |
| Cost per solved task | Not computable | $0.14 |
| Context window | 1M | 400K |
| Claude Fable 5.1 | GPT-5.4 Nano | |
|---|---|---|
| Coding index | 84.2 | 44.8 |
| Benchmarks behind it | Verified, 5 benchmarks | Partial, 2 benchmarks |
| Output $/Mtok | $50.00 | $1.25 |
| Cost per solved task | Not computable | $0.14 |
| Context window | 1M | 400K |