Claude Opus 4.6 vs GPT-5.5 Pro
Benchmarks, API pricing and specs, head to head. Data updated 2026-06-10.
Claude Opus 4.6
Anthropic · Jan 2026
The first Opus with a 1M-token context window at standard pricing, kicking off Anthropic's rapid 2026 release cadence.
GPT-5.5 Pro
OpenAI · Apr 2026
The maximum-compute tier of GPT-5.5 for the hardest research, math and engineering problems, at a steep per-token premium.
The verdict
These two models don't yet share verified results on the benchmarks we track, so judge them on specs, pricing and intended use. On price the gap is dramatic: Claude Opus 4.6 works out roughly 6.8x cheaper per blended million tokens.
Specs & pricing
| Claude Opus 4.6 | GPT-5.5 Pro | |
|---|---|---|
| modhub Index | — | — |
| Input price / 1M | $5 | $30 |
| Output price / 1M | $25 | $180 |
| Context window | 1M | 1M |
| Max output | 64K | 128K |
| Open weights | no | no |
| Reasoning model | yes | yes |
| Multimodal input | text, image | text, image |
| Knowledge cutoff | Aug 2025 | Jan 2026 |
| Released | Jan 2026 | Apr 2026 |
| Example monthly cost* | $87.50 | $570.00 |
* 10M input + 1.5M output tokens per month at list prices, no caching. Green = better value on that row.
Frequently asked questions
- Which is better, Claude Opus 4.6 or GPT-5.5 Pro?
- These two models don't yet share verified results on the benchmarks we track, so judge them on specs, pricing and intended use. On price the gap is dramatic: Claude Opus 4.6 works out roughly 6.8x cheaper per blended million tokens.
- Which is cheaper, Claude Opus 4.6 or GPT-5.5 Pro?
- Claude Opus 4.6 costs $5/$25 per million input/output tokens, while GPT-5.5 Pro costs $30/$180. For a typical workload of 10M input and 1.5M output tokens per month, that's $87.50 versus $570.00.
- Which model is better for coding, Claude Opus 4.6 or GPT-5.5 Pro?
- We don't yet track SWE-bench Verified results for both models; check their individual pages for coding-related scores.