Claude Sonnet 5.5 vs GPT-5.6 Terra: Pricing and Specs
Claude Sonnet 5.5 $2 / $10 vs GPT-5.6 Terra $2 / $12 per 1M tokens in / out.
| Claude Sonnet 5.5 | GPT-5.6 Terra | |
|---|---|---|
| Maker | Anthropic | OpenAI |
| Input, per 1M tokens | $2 | $2 |
| Output, per 1M tokens | $10 | $12 |
| Context window | 1M tokens claude.com | 1,050,000 tokens openai.com |
| Max output | 128K tokens claude.com | 128,000 tokens openai.com |
| Input types | Text, Image claude.com | Text, Image openai.com |
| Output types | Text claude.com | Text openai.com |
| Released | Sep 28, 2026 claude.com | Not published in the docs we read |
| Retirement | Not sooner than September 28, 2027 claude.com | Not published in the docs we read |
| Price checked | Nov 9, 2026 anthropic.com | Nov 9, 2026 openai.com |
| Tracked changes | 2 | 0 |
Facts side by side from each maker's own pages. No score and no verdict.
Recent changes
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Questions
Which is cheaper, Claude Sonnet 5.5 or GPT-5.6 Terra
They list the same price: $2 per 1M input tokens.
What do 1M input and 1M output tokens cost on each
Claude Sonnet 5.5: $12. GPT-5.6 Terra: $14. Listed standard prices, before caching or batch discounts.
What context window does each have
Claude Sonnet 5.5: 1M tokens. GPT-5.6 Terra: 1,050,000 tokens. From each maker's docs.
Who makes Claude Sonnet 5.5 and GPT-5.6 Terra
Claude Sonnet 5.5 is made by Anthropic. GPT-5.6 Terra is made by OpenAI.