token.app › Compare › o1 vs Claude Opus 5
o1 vs Claude Opus 5
Claude Opus 5 leads on 3 of 3 shared benchmarks. Claude Opus 5 is 2.6× cheaper per token on a blended 3:1 basis. Claude Opus 5 accepts the larger context window (1M).
Head to head
Blended price uses a 3:1 input:output mix
| o1 | Claude Opus 5 | |
|---|---|---|
| Provider | OpenAI | Anthropic |
| Input $/1M | $15.00 | $5.00 |
| Output $/1M | $60.00 | $25.00 |
| Blended $/1M | $26.25 | $10.00 |
| Context window | 200K | 1M |
| Max output | 100K | 128K |
| Released | Dec 2024 | Jul 2026 |
| Licence | Proprietary | Proprietary |
| GPQA Diamond | 76.8% | 93.9% |
| FrontierMath T1–3 | 14.7% | 85.6% |
| OTIS Mock AIME | 73.3% | 98.9% |
Benchmark scores independently run and published by Epoch AI, 'AI Benchmarking Hub', used under CC BY 4.0. Only benchmarks with a score for BOTH models are compared.
Choose o1 if…
- No clear advantage on the data we hold.
Choose Claude Opus 5 if…
- Costs less per token — $10.00 vs $26.25 blended
- Higher GPQA Diamond (93.9% vs 76.8%)
- Higher FrontierMath T1–3 (85.6% vs 14.7%)
- Higher OTIS Mock AIME (98.9% vs 73.3%)
- Larger context window (1M)
- Newer model (released Jul 2026)
FAQ
Which is better, o1 or Claude Opus 5?
Across the 3 benchmarks both models have independently-run scores for, o1 leads on 0 and Claude Opus 5 leads on 3. Benchmarks are one input — price and context window are on this page too.
Is o1 cheaper than Claude Opus 5?
Claude Opus 5 is cheaper: $10.00 versus $26.25 per million tokens blended at 3:1 input:output. Input alone: $15.00 vs $5.00. Output alone: $60.00 vs $25.00.
What context windows do o1 and Claude Opus 5 have?
o1: 200,000 tokens. Claude Opus 5: 1,000,000 tokens.
Who makes o1 and Claude Opus 5?
o1 is made by OpenAI. Claude Opus 5 is made by Anthropic.