All prices › Anthropic › Claude Sonnet 5.5
Claude Sonnet 5.5 API pricing
As of October 16, 2026, Claude Sonnet 5.5 costs $2.00 per million input tokens and $10.00 per million output tokens on the Anthropic API. Cached input is $0.10 per million.
New Sep 28
It is the 4th cheapest of 16 Claude models tracked here, by blended price. The closest Standard-tier model from another provider is GPT-6 Sol (OpenAI) at $2.00 / $10.00, the same blended price. Same list price as Claude Sonnet 5, GPT-6 Sol, GPT-6.1 Sol, Gemini 4 Argon. First listed in the LiteLLM price data on September 28, 2026.
Input / 1M tokens$2.00
Output / 1M tokens$10.00
Context window1M
Max output128K
Every published rate
| Rate | Per 1M tokens |
|---|---|
| Input (standard) | $2.00 |
| Output (standard) | $10.00 |
| Cached input (read) | $0.10 |
| Cache write | $2.50 |
| Batch input | $1.00 |
| Batch output | $5.00 |
What it costs in practice
| Task | Tokens | Per request | Per 1,000 requests |
|---|---|---|---|
| Chatbot reply | 1,000 in / 500 out | $0.007 | $7.00 |
| Summarize a long document | 20,000 in / 1,000 out | $0.05 | $50.00 |
| Coding agent step | 50,000 in / 2,000 out | $0.12 | $120 |
Standard rates, no caching or batch discount. Compare your own numbers across all models →
Price history
| Date | Model | Change |
|---|---|---|
| 2026-09-28 | Claude Sonnet 5.5 | New model listed: $2 in / $10 out source |
Dates are when each change first appeared in the LiteLLM price data, usually within days of the provider's announcement.
Details
| Provider | Anthropic |
| Price tier | Standard |
| Features | Vision, Reasoning, Prompt caching, Tool use, PDF input, Web search |
| API model names | claude-sonnet-5-5 |
| Official pricing | platform.claude.com |
Models at a similar price
| Model | Input / 1M | Output / 1M |
|---|---|---|
| Claude Sonnet 5 | $2.00 | $10.00 |
| GPT-6 Sol | $2.00 | $10.00 |
| GPT-6.1 Sol | $2.00 | $10.00 |
| Gemini 4 Argon | $2.00 | $10.00 |
| GPT-4o | $2.50 | $10.00 |
| GPT-5.6 Terra | $2.00 | $12.00 |
Other Anthropic models
| Model | Input / 1M | Output / 1M |
|---|---|---|
| Claude Fable 5 | $10.00 | $50.00 |
| Claude Fable 5.1 | $10.00 | $50.00 |
| Claude Mythos 5 | $10.00 | $50.00 |
| Claude Mythos 5.1 | $10.00 | $50.00 |
| Claude Opus 4.5 | $5.00 | $25.00 |
| Claude Opus 4.6 | $5.00 | $25.00 |
| Claude Opus 4.7 | $5.00 | $25.00 |
| Claude Opus 5 | $5.00 | $25.00 |
| Claude Opus 4.8 | $5.00 | $25.00 |
| Claude Opus 5.5 | $4.00 | $20.00 |
| Claude Sonnet 4.5 | $3.00 | $15.00 |
| Claude Sonnet 4.6 | $3.00 | $15.00 |
| Claude Sonnet 5 | $2.00 | $10.00 |
| Claude Haiku 4.5 | $1.00 | $5.00 |
| Claude Haiku 5.5 | $0.10 | $0.50 |