Claude Opus 4.1 is an updated version of Anthropic’s flagship model, offering improved performance in coding, reasoning, and agentic tasks. It achieves 74.5% on SWE-bench Verified and shows notable gains...
Model details →Anthropic: Claude Opus 4.1 vs OpenAI: GPT-5.5 Pro (batch)
Anthropic: Claude Opus 4.1 and OpenAI: GPT-5.5 Pro (batch) are evenly matched on 6 axes — pick the one whose provider, latency, or licensing fits your stack.
GPT-5.5 Pro is OpenAI’s high-capability model optimized for deep reasoning and accuracy on complex, high-stakes workloads. It features a 1M+ token context window (922K input, 128K output) with support for...
Model details →Side-by-side comparison
| Capability | Anthropic: Claude Opus 4.1 | OpenAI: GPT-5.5 Pro (batch) | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 200K | 1.1M | 🏆 OpenAI: GPT-5.5 Pro (batch) |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $15.00 | $15.00 | Tie |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $75.00 | $90.00 | 🏆 Anthropic: Claude Opus 4.1 |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | Yes | Yes | Tie |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is Anthropic: Claude Opus 4.1 better than OpenAI: GPT-5.5 Pro (batch)?
Anthropic: Claude Opus 4.1 and OpenAI: GPT-5.5 Pro (batch) are evenly matched on 6 axes — pick the one whose provider, latency, or licensing fits your stack.
What's the price difference between Anthropic: Claude Opus 4.1 and OpenAI: GPT-5.5 Pro (batch)?
Input: $15.00 vs $15.00 per 1M tokens. Output: $75.00 vs $90.00 per 1M tokens.
What context windows do Anthropic: Claude Opus 4.1 and OpenAI: GPT-5.5 Pro (batch) support?
Anthropic: Claude Opus 4.1 supports up to 200K tokens. OpenAI: GPT-5.5 Pro (batch) supports up to 1.1M tokens.
Do both Anthropic: Claude Opus 4.1 and OpenAI: GPT-5.5 Pro (batch) support tool calling?
Anthropic: Claude Opus 4.1: yes. OpenAI: GPT-5.5 Pro (batch): yes.
Compare Anthropic: Claude Opus 4.1 with other models
vs Anthropic Claude Haiku Latestvs Anthropic Claude Sonnet Latestvs Anthropic: Claude Fable Latestvs Anthropic: Claude Opus Latest