$ diff claude-sonnet-5-5 gpt-6-sol
Claude Sonnet 5.5 vs GPT-6 Sol
Values come from Claude Sonnet 5.5 and GPT-6 Sol, where each is cited to its source. This page states no benchmark result and ranks neither model — it puts two published specifications next to each other. Where a lab has not published a figure, the row says so rather than guessing.
AnthropicClaude Sonnet 5.5
- context
- 1M
- weights
- closed
- $/M in
- $2
- $/M out
- $10
- context
- 1.1M
- weights
- closed
- $/M in
- $2
- $/M out
- $10
What actually differs
- Context window
- GPT-6 Sol takes 1.1M against 1M — modestly more room in a single request.
- Recency
- Claude Sonnet 5.5 shipped 6 days after GPT-6 Sol (2026-09-28 vs 2026-09-22).
Full spec
| Attribute | Claude Sonnet 5.5 | GPT-6 Sol |
|---|---|---|
| Developer | Anthropic | OpenAI |
| Released | 2026-09-28 | 2026-09-22 |
| Context window | 1M tokens | 1.05M tokens |
| Pricing | $2/M input · $10/M output · cache reads 10% of base input | $2/M input · $10/M output · cached input $0.20/M |
| License | proprietary (API-only; no weight release) | proprietary (API-only; no weight release) |
| Availability | Claude apps, Claude API as `claude-sonnet-5-5`, Amazon Bedrock, Google Cloud Vertex AI, Microsoft Foundry, Claude Platform on AWS | ChatGPT Work and Codex (Plus, Pro, Business, Enterprise, Edu); OpenAI API as `gpt-6-sol`. Not yet in Chat |