// anthropic model
Claude Sonnet 5.5
Claude Sonnet 5.5 is Anthropic's Sonnet-class model released on September 28, 2026, succeeding Claude Sonnet 5 as a direct upgrade. It is designed for well-scoped everyday work and accepts text, image, and file inputs with a 1,000,000 token context window.
Claude Sonnet 5.5 pricing
| model | input / 1M | output / 1M | context |
|---|---|---|---|
| Claude Sonnet 5.5 | $2 | $10 | 1,000,000 |
Rates come from the OpenRouter price list and are checked daily (prices updated 2026-11-11)
Compare Claude Sonnet 5.5 with other models
| model | input / 1M | output / 1M | context |
|---|---|---|---|
| Claude Sonnet 5.5 | $2 | $10 | 1,000,000 |
| GPT-5.6 Sol Pro | $4 | $20 | 1,050,000 |
| Claude Sonnet 5 | $2 | $10 | 1,000,000 |
| Gemini 3.5 Flash | $1.5 | $9 | 1,048,576 |
| GLM 5.3 Prime | $2.8 | $8.8 | 1,000,000 |
Among the models in this comparison, Gemini 3.5 Flash has the lowest output price at $9 per million tokens, while GPT-5.6 Sol Pro is the most expensive at $20 per million output tokens.
Articles about Claude Sonnet 5.5
- GPT-6.1 Terra vs Claude Sonnet 5.5: Polish Test Results 2026-11-02
- GPT-6 Astra vs Claude Opus 5.5: 9 Tests, Results and Costs 2026-10-12
- Claude Fable 5.2 Release Date: What We Know About the New Model 2026-10-01
- Claude Sonnet 5.5: Pricing, Benchmarks, and Tested Performance 2026-10-01
- Claude Opus 5.5: Price, Benchmarks & Tests 2026-09-30
- AI Calendar 2026: Model Launches, Events, and Legal Deadlines 2026-09-30
- Claude Sonnet 5.5 Context Window: 1 Million Token Capacity 2026-09-28
- Is Claude Sonnet 5.5 Free? Access Options Explained 2026-09-28
- Is Claude Sonnet 5.5 Worth It? Cost-Benefit Analysis 2026-09-28
- Claude Sonnet 5.5 Alternatives: 4 Models Ranked by Price 2026-09-28
- Claude Sonnet 5.5 vs GPT-5.6 Sol Pro: Which Model to Choose 2026-09-28
- Claude Sonnet 5.5 Price: Cost per Million Tokens in 2026 2026-09-28
Frequently asked questions
- How much does Claude Sonnet 5.5 cost?
- Claude Sonnet 5.5 costs $2 per million input tokens and $10 per million output tokens through OpenRouter. These rates were recorded on September 28, 2026.
- What is the context window of Claude Sonnet 5.5?
- Claude Sonnet 5.5 has a context window of 1,000,000 tokens. This allows the model to process large documents and maintain context across extended conversations.
- How does Claude Sonnet 5.5 compare to GPT-5.6 Sol Pro?
- Claude Sonnet 5.5 is significantly less expensive than GPT-5.6 Sol Pro, costing $2 per million input tokens versus $4, and $10 per million output tokens versus $20. GPT-5.6 Sol Pro offers a slightly larger context window at 1,050,000 tokens compared to Claude Sonnet 5.5's 1,000,000 tokens.
- What types of input does Claude Sonnet 5.5 accept?
- Claude Sonnet 5.5 accepts text, image, and file inputs. This multimodal capability allows the model to process various content types in a single request.
- What is Claude Sonnet 5.5 designed for?
- According to Anthropic, Claude Sonnet 5.5 is designed for well-scoped everyday work and is especially strong at building features, fixing bugs, and producing content. It succeeds Claude Sonnet 5 as a direct upgrade in the Sonnet-class model line.