Anthropic vs 
OpenAI
Verdict
- Their flagships are level: GPT-6 Astra 70.6 vs Claude Fable 5 70.4.
- OpenAI has the better model in 4 of 4 price bands.
- OpenAI's fastest ranked model (GPT-5.4 mini, 218 tok/s) beats Anthropic's (Claude Haiku 4.5, 83 tok/s).
- OpenAI publishes more open-weights models (4 vs 0).
- OpenAI ships more often: one model every 26 days against every 40.
Best model per price band
Each provider’s highest-index model below the price ceiling. Purple marks the winner of the band.
| Price band | Anthropic | OpenAI |
|---|---|---|
| Under $0.50/M | – | GPT-5.6 Luna xhigh 59.3$0.450/M |
| Under $2/M | Claude 3 Haiku 36.9$0.500/M | GPT-5.6 Luna xhigh 59.3$0.450/M |
| Under $10/M | Claude Sonnet 5 61.2$4.00/M | GPT-5.6 Sol high 68.0$8.00/M |
| Any price | Claude Fable 5 70.4$20.00/M | GPT-6 Astra max 70.6$22.00/M |
Line-up
| Metric | Anthropic | OpenAI |
|---|---|---|
| Flagship index | 70.4 | 70.6 |
| Ranked models | 20 | 38 |
| Open-weights models | 0 | 4 |
| Cheapest ranked, $/M | $0.500 | $0.085 |
| Fastest ranked, tok/s | 83 | 218 |
| Release cadence, days | 40 | 26 |
| Last release | 1 Sept 2026 | 3 Sept 2026 |
| Next expected | 25 Sept 2026 – 27 Oct 2026 | 18 Sept 2026 – 9 Oct 2026 |