token.app › Compare › GPT-5.5 Pro vs Claude Opus 5
GPT-5.5 Pro vs Claude Opus 5
GPT-5.5 Pro leads on 2 of 2 shared benchmarks. Claude Opus 5 is 6.8× cheaper per token on a blended 3:1 basis. GPT-5.5 Pro accepts the larger context window (1.1M).
Head to head
Blended price uses a 3:1 input:output mix
| GPT-5.5 Pro | Claude Opus 5 | |
|---|---|---|
| Provider | OpenAI | Anthropic |
| Input $/1M | $30.00 | $5.00 |
| Output $/1M | $180.00 | $25.00 |
| Blended $/1M | $67.50 | $10.00 |
| Context window | 1.1M | 1M |
| Max output | 128K | 128K |
| Released | Apr 2026 | Jul 2026 |
| Licence | Proprietary | Proprietary |
| FrontierMath T1–3 | 87.7% | 85.6% |
| FrontierMath T4 | 78.0% | 73.2% |
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 GPT-5.5 Pro if…
- Higher FrontierMath T1–3 (87.7% vs 85.6%)
- Higher FrontierMath T4 (78.0% vs 73.2%)
- Larger context window (1.1M)
Choose Claude Opus 5 if…
- Costs less per token — $10.00 vs $67.50 blended
- Newer model (released Jul 2026)
FAQ
Which is better, GPT-5.5 Pro or Claude Opus 5?
Across the 2 benchmarks both models have independently-run scores for, GPT-5.5 Pro leads on 2 and Claude Opus 5 leads on 0. Benchmarks are one input — price and context window are on this page too.
Is GPT-5.5 Pro cheaper than Claude Opus 5?
Claude Opus 5 is cheaper: $10.00 versus $67.50 per million tokens blended at 3:1 input:output. Input alone: $30.00 vs $5.00. Output alone: $180.00 vs $25.00.
What context windows do GPT-5.5 Pro and Claude Opus 5 have?
GPT-5.5 Pro: 1,050,000 tokens. Claude Opus 5: 1,000,000 tokens.
Who makes GPT-5.5 Pro and Claude Opus 5?
GPT-5.5 Pro is made by OpenAI. Claude Opus 5 is made by Anthropic.