Compare / head-to-head
Claude Opus 4.1vsGPT-5.5 Pro
GPT-5.5 Pro leads 2 of 2 shared benchmarks. Claude Opus 4.1 is 2.3x cheaper per token. GPT-5.5 Pro has the larger context window (1.1M tokens).
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
0 – 2
GPT-5.5 Pro leads
Cheaper per token
Claude Opus 4.1
2.3x cheaper, input + output
Larger context
GPT-5.5 Pro
1.1M tokens
Provider uptime (30d)
100% · 94.2446%
Anthropic · OpenAI
Claude Opus 4.1
Anthropic · released 2025-08-05
textvision
GPT-5.5 Pro
OpenAI · released 2026-04-23
textvision
Quality
Benchmark matrix
2 shared · 4 only Claude Opus 4.1 · 6 only GPT-5.5 Pro| Benchmark | Claude Opus 4.1 | GPT-5.5 Pro | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 2 | ||||
| FrontierMath Tier 4 v2 (Epoch AI run) | 2.4% ↗epoch | 78% ↗epoch | -75.6 pt | GPT-5.5 Pro |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | 12.6% ↗epoch | 87.7% ↗epoch | -75.1 pt | GPT-5.5 Pro |
| Only Claude Opus 4.1 reports · 4 | ||||
| SWE-bench Verified | 74.5% ↗ | not reported | — | — |
| GPQA Diamond | 77.3% ↗epoch | not reported | — | — |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 68.9% ↗epoch | not reported | — | — |
| SWE-bench Verified (Epoch AI run) | 73.3% ↗epoch | not reported | — | — |
| Only GPT-5.5 Pro reports · 6 | ||||
| Humanity's Last Exam (no tools) | not reported | 43.1% ↗ | — | — |
| BrowseComp | not reported | 90.1% ↗ | — | — |
| FrontierMath Tier 1-3 | not reported | 52.4% ↗ | — | — |
| FrontierMath Tier 4 | not reported | 39.6% ↗ | — | — |
| GDPval (wins or ties) | not reported | 82.3% ↗ | — | — |
| Humanity's Last Exam (with tools) | not reported | 57.2% ↗ | — | — |
Scores tagged "epoch" or "matharena" are independent runs, used only where the lab has not published its own; ⚠ marks rows MathArena flags as released after the competition. Higher is better on every row. Δ is Claude Opus 4.1 minus GPT-5.5 Pro in the benchmark's own unit. "Not reported" means the lab has not published that figure; it is not a zero. ↗ opens the source.
Specs & pricing
Side by side
Official pricing pages and model cards| Spec | Claude Opus 4.1 | GPT-5.5 Pro | Edge |
|---|---|---|---|
| Context window | 200K tokens | 1.1M tokens | GPT-5.5 Pro |
| Max output | 32K tokens | 128K tokens | GPT-5.5 Pro |
| Input price / 1M | $15 ↗ | $30 ↗ | Claude Opus 4.1 |
| Output price / 1M | $75 ↗ | $180 ↗ | Claude Opus 4.1 |
| Cached input / 1M | $1.5 ↗ | — | — |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $90 | $210 | Claude Opus 4.1 |
| Modalities | text · vision | text · vision | Tie |
| Released | 2025-08-05 | 2026-04-23 | — |
| Cited benchmark scores | 6 | 8 | — |
Reliability
Provider status
Last 60 days · refreshed daily on this page · live on /statusMore matchups
Claude Opus 4.1 vs …
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GPT-5.5 Pro vs …
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Which one wins on your data?
Public benchmarks are a starting point. Run Claude Opus 4.1 and GPT-5.5 Pro on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.