Claude Opus 4.7 vs GPT-5.5 for coding
GPT-5.5 is the stronger coder of the two on benchmarks, but Claude Opus 4.7 can be the better pick when cost, speed, or context window matter more. Below: a side-by-side spec table and exactly when to pick each.
At a glance
| Spec | Claude Opus 4.7 | GPT-5.5 |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Released | Nov 2025 | Apr 2026 |
| SWE-bench Verified | 72% | 75% |
| HumanEval | 94% | 95% |
| MMLU | 88% | 89% |
| Context window | 200K | 1M+ |
| Max output | 32K | 128K |
| Input price (per 1M) | $15 | $5 |
| Output price (per 1M) | $75 | $30 |
| Price tier | Premium | Premium |
| Speed | Slow/Reasoning | Standard |
| Hosting | Closed/API | Closed/API |
| Modality | Multimodal (vision) | Multimodal (vision) |
| Knowledge cutoff | Jan 2026 | Jan 2026 |
Pick Claude Opus 4.7 if…
- It's tuned for complex refactors, agentic coding, hard debugging, deep reasoning.
Pick GPT-5.5 if…
- It scores higher on SWE-bench Verified (75% vs 72%), the best proxy for real-world coding.
- It has a larger context window (1M+ vs 200K).
- It responds faster (Standard).
- It's tuned for frontier reasoning, agentic coding, long-context refactors, multimodal analysis, replaces GPT-5.4 as default flagship.
Claude Opus 4.7 vs GPT-5.5: which is better for coding?
GPT-5.5 is the stronger coder of the two on benchmarks, but Claude Opus 4.7 can be the better pick when cost, speed, or context window matter more. See the full spec table for SWE-bench, HumanEval, MMLU, context window, and pricing on both. Benchmarks are a directional signal, not a guarantee for your codebase — the most reliable test is running both on a real task you care about.
Compare these head-to-head with live data, or build a full stack around your pick — Flowpicker shows compatibility and monthly cost.
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See the full model leaderboard ranked by SWE-bench, HumanEval, and MMLU.