Sonnet 4.6 is Anthropic's most capable Sonnet-class model yet, with frontier performance across coding, agents, and professional work. It excels at iterative development, complex codebase navigation, end-to-end project management with...
Model details →Anthropic: Claude Sonnet 4.6 (batch) vs OpenAI: GPT-5.1 Chat
Anthropic: Claude Sonnet 4.6 (batch) wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
GPT-5.1 Chat (AKA Instant is the fast, lightweight member of the 5.1 family, optimized for low-latency chat while retaining strong general intelligence. It uses adaptive reasoning to selectively “think” on harder queries, improving accuracy…
Model details →Side-by-side comparison
| Capability | Anthropic: Claude Sonnet 4.6 (batch) | OpenAI: GPT-5.1 Chat | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 1M | 128K | 🏆 Anthropic: Claude Sonnet 4.6 (batch) |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $1.50 | $1.25 | 🏆 OpenAI: GPT-5.1 Chat |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $7.50 | $10.00 | 🏆 Anthropic: Claude Sonnet 4.6 (batch) |
| 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 | — | 🏆 Anthropic: Claude Sonnet 4.6 (batch) |
Frequently asked questions
Is Anthropic: Claude Sonnet 4.6 (batch) better than OpenAI: GPT-5.1 Chat?
Anthropic: Claude Sonnet 4.6 (batch) wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between Anthropic: Claude Sonnet 4.6 (batch) and OpenAI: GPT-5.1 Chat?
Input: $1.50 vs $1.25 per 1M tokens. Output: $7.50 vs $10.00 per 1M tokens.
What context windows do Anthropic: Claude Sonnet 4.6 (batch) and OpenAI: GPT-5.1 Chat support?
Anthropic: Claude Sonnet 4.6 (batch) supports up to 1M tokens. OpenAI: GPT-5.1 Chat supports up to 128K tokens.
Do both Anthropic: Claude Sonnet 4.6 (batch) and OpenAI: GPT-5.1 Chat support tool calling?
Anthropic: Claude Sonnet 4.6 (batch): yes. OpenAI: GPT-5.1 Chat: yes.
Compare Anthropic: Claude Sonnet 4.6 (batch) with other models
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