Model comparison · updated 2026-07-28
Side-by-side pricing for1 million tokens
| Claude Sonnet 5 | GPT-5.6 Luna | Verdict | |
|---|---|---|---|
| Provider | Anthropic | OpenAI | -- |
| Context window | 1M | 1.05M | -- |
| Input / 1M tokens | $2 | $1 | GPT-5.6 Luna is 2x cheaper |
| Output / 1M tokens | $10 | $6 | GPT-5.6 Luna is 1.7x cheaper |
| Output:input ratio | 5x | 6x | -- |
| Tier | balanced | budget | -- |
Claude Sonnet 5: Introductory pricing — list price is $3 / $15 from Sep 1, 2026.
Claude Sonnet 5
5,000,000 tokens
GPT-5.6 Luna
10,000,000 tokens
GPT-5.6 Luna gives you 2x more input for the same budget.
Claude Sonnet 5
1,000,000 tokens
GPT-5.6 Luna
1,666,667 tokens
GPT-5.6 Luna gives you 1.7x more output for the same budget.