AnthropicreasoningClaude Sonnet 5.5 pricing
$2.00 per 1M input tokens and $10.00 per 1M output tokens. In real work that is 1.3¢ per chat answer and 4.5¢ to summarize a 20-page PDF.
Official price at Anthropic: $2.00 / $10.00 per 1M, cached $0.10 (source, verified Oct 18, 2026).
What Claude Sonnet 5.5 costs per task
Every row below was measured: we ran the task on this model and counted the tokens. Reasoning tokens are billed as output.
| Task | Cost | Tokens used | Price rank | Basis |
|---|---|---|---|---|
| Answer a chat question | 1.3¢$12.68 / 1,000 | 61 in · 1,256 out | 287 of 336 | measured |
| Reply to a customer email | 0.40¢$3.97 / 1,000 | 362 in · 325 out | 264 of 336 | measured |
| Write a 1,500-word blog post | 3.7¢$36.58 / 1,000 | 90 in · 3,401 out · 239 reasoning | 285 of 336 | measured |
| Write 10 product descriptions | 4.4¢$44.16 / 1,000 | 454 in · 1,866 out · 2,459 reasoning | 303 of 336 | measured |
| Translate 1,000 words | 2.6¢$25.52 / 1,000 | 1,832 in · 2,186 out | 265 of 336 | measured |
| Proofread one page (500 words) | 1.1¢$11.10 / 1,000 | 987 in · 913 out | 272 of 336 | measured |
| Summarize a 20-page PDF | 4.5¢$44.58 / 1,000 | 18,004 in · 857 out | 296 of 336 | measured |
| Extract data from an invoice | 1.0¢$10.30 / 1,000 | 546 in · 604 out · 317 reasoning | 279 of 336 | measured |
| Analyze a 200-row spreadsheet | ≥17¢$171 / 1,000 | 5,433 in · 0 out · 16,000 reasoning | 298 of 336 | measured |
| Answer from 5 retrieved documents (RAG) | 2.7¢$27.31 / 1,000 | 5,184 in · 1,079 out · 615 reasoning | 297 of 336 | measured |
| Classify 100 support tickets | 0.89¢$8.90 / 1,000 | 1,747 in · 541 out | 198 of 336 | measured |
| Review 500 lines of code | 8.0¢$79.66 / 1,000 | 7,117 in · 3,067 out · 3,476 reasoning | 280 of 336 | measured |
| Write a SQL query | 1.1¢$10.93 / 1,000 | 182 in · 839 out · 218 reasoning | 276 of 336 | measured |
| Run a 50-step coding agent | 84¢$842 / 1,000 | 3,101,175 in · 20,790 out · 10,900 reasoning | 222 of 336 | modeled |
Price at every provider
List prices per 1M tokens (input / output) at each host serving Claude Sonnet 5.5 through OpenRouter today. Hosts can differ in quantization, context and speed.
| Provider | Input / output | Cached input | Context | Uptime |
|---|---|---|---|---|
 Googleunknown | $2.00 / $10.00 | $0.10 | 1M | 100% |
 Amazon Bedrockunknown | $2.00 / $10.00 | $0.10 | 1M | 100% |
 Azureunknown | $2.00 / $10.00 | $0.10 | 1M | 100% |
 Claude Platform on AWSunknown | $2.00 / $10.00 | $0.10 | 1M | 100% |
Anthropicunknown | $2.00 / $10.00 | $0.10 | 1M | 100% |
Googleunknown | $2.20 / $11.00 | $0.11 | 1M | 100% |
Azureunknown | $2.20 / $11.00 | $0.11 | 1M | |
Googleunknown | $2.20 / $11.00 | $0.11 | 1M | 100% |
Price history
First seen in our price history on Sep 29, 2026 at $2.00 input / $10.00 output. The list price has not changed since.
FAQ
How much does Claude Sonnet 5.5 cost?
Claude Sonnet 5.5 costs $2.00 per 1 million input tokens and $10.00 per 1 million output tokens, with cached input at $0.10 (list price on Oct 18, 2026). In practice one chat answer costs about 1.3¢ and summarizing a 20-page PDF about 4.5¢.
Where is Claude Sonnet 5.5 cheapest?
Among 8 providers we track, the lowest list price today is at Google: $2.00 input and $10.00 output per 1M tokens.
Does Claude Sonnet 5.5 charge for reasoning tokens?
Yes. Reasoning (thinking) tokens are billed as output tokens. That is why the cost per task can be much higher than the visible answer suggests - our task costs include them.
Is the Claude Sonnet 5.5 cost per task measured or estimated?
Measured: we ran all 13 benchmark prompts on Claude Sonnet 5.5 through OpenRouter and recorded the tokens it used.