Sonnet 5 is Anthropic's most capable Sonnet-class model, with frontier performance across coding, agents, and professional work. It supports adaptive thinking with selectable reasoning effort levels (low, medium, high, max,...
Model details →Anthropic: Claude Sonnet 5 (batch) vs OpenAI: GPT-5.6 Terra (batch)
Anthropic: Claude Sonnet 5 (batch) and OpenAI: GPT-5.6 Terra (batch) are evenly matched on 6 axes — pick the one whose provider, latency, or licensing fits your stack.
GPT-5.6 Terra is a balanced model in OpenAI's GPT-5.6 series, positioned between the flagship Sol tier and the cost-efficient Luna tier. It is suited for everyday coding, reasoning, and agentic...
Model details →Side-by-side comparison
| Capability | Anthropic: Claude Sonnet 5 (batch) | OpenAI: GPT-5.6 Terra (batch) | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 1M | 1.1M | 🏆 OpenAI: GPT-5.6 Terra (batch) |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $1.00 | $1.00 | Tie |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $5.00 | $6.00 | 🏆 Anthropic: Claude Sonnet 5 (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 | Yes | Tie |
Frequently asked questions
Is Anthropic: Claude Sonnet 5 (batch) better than OpenAI: GPT-5.6 Terra (batch)?
Anthropic: Claude Sonnet 5 (batch) and OpenAI: GPT-5.6 Terra (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 Sonnet 5 (batch) and OpenAI: GPT-5.6 Terra (batch)?
Input: $1.00 vs $1.00 per 1M tokens. Output: $5.00 vs $6.00 per 1M tokens.
What context windows do Anthropic: Claude Sonnet 5 (batch) and OpenAI: GPT-5.6 Terra (batch) support?
Anthropic: Claude Sonnet 5 (batch) supports up to 1M tokens. OpenAI: GPT-5.6 Terra (batch) supports up to 1.1M tokens.
Do both Anthropic: Claude Sonnet 5 (batch) and OpenAI: GPT-5.6 Terra (batch) support tool calling?
Anthropic: Claude Sonnet 5 (batch): yes. OpenAI: GPT-5.6 Terra (batch): yes.
Compare Anthropic: Claude Sonnet 5 (batch) with other models
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