Home › Compare › Anthropic: Claude Sonnet 5.5 vs OpenAI: GPT-6 Sol
Anthropic: Claude Sonnet 5.5 vs OpenAI: GPT-6 Sol: API Pricing Compared
Comparing Anthropic: Claude Sonnet 5.5 and OpenAI: GPT-6 Sol: on combined input+output list price, Anthropic: Claude Sonnet 5.5 is cheaper at $12 vs $12 per 1M tokens — a difference of $0 (free) (0%). Anthropic: Claude Sonnet 5.5 costs $2 in / $10 out with a 1,000,000-token context; OpenAI: GPT-6 Sol costs $2 in / $10 out with a 1,050,000-token context.
| Anthropic: Claude Sonnet 5.5 | OpenAI: GPT-6 Sol | |
|---|---|---|
| Input /1M | $2 | $2 |
| Output /1M | $10 | $10 |
| Cached input /1M | $0.1 | $0.2 |
| Context window | 1,000,000 | 1,050,000 |
| Max output tokens | 128,000 | 128,000 |
| Cost @ 10M in + 2M out / mo | $40 | $40 |
Estimate your own workload in the cost calculator, or open the full pages for Anthropic: Claude Sonnet 5.5 and OpenAI: GPT-6 Sol.
Frequently asked questions
Which is cheaper, Anthropic: Claude Sonnet 5.5 or OpenAI: GPT-6 Sol?
Anthropic: Claude Sonnet 5.5 is cheaper on combined list price: $12 vs $12 per 1M tokens (input + output). At 10M input + 2M output tokens per month, Anthropic: Claude Sonnet 5.5 costs $40 and OpenAI: GPT-6 Sol costs $40.
Which has the larger context window, Anthropic: Claude Sonnet 5.5 or OpenAI: GPT-6 Sol?
Anthropic: Claude Sonnet 5.5 has a context window of 1,000,000 tokens; OpenAI: GPT-6 Sol has 1,050,000 tokens. The larger one is OpenAI: GPT-6 Sol.
Price snapshot October 21, 2026, refreshed daily.