AnthropicClaude Sonnet 4.5 pricing
$3.00 per 1M input tokens and $15.00 per 1M output tokens. In real work that is 1.9¢ per chat answer and 6.7¢ to summarize a 20-page PDF.
What Claude Sonnet 4.5 costs per task
Token counts estimated from a measured model of the same lab (Claude Sonnet 5.5), rescaled by tokenizer. Reasoning tokens are billed as output.
| Task | Cost | Tokens used | Price rank | Basis |
|---|---|---|---|---|
| Answer a chat question | 1.9¢$19.02 / 1,000 | 61 in · 1,256 out | 303 of 336 | estimated |
| Reply to a customer email | 0.60¢$5.96 / 1,000 | 362 in · 325 out | 283 of 336 | estimated |
| Write a 1,500-word blog post | 5.5¢$54.87 / 1,000 | 90 in · 3,401 out · 239 reasoning | 299 of 336 | estimated |
| Write 10 product descriptions | 6.6¢$66.24 / 1,000 | 454 in · 1,866 out · 2,459 reasoning | 313 of 336 | estimated |
| Translate 1,000 words | 3.8¢$38.29 / 1,000 | 1,832 in · 2,186 out | 286 of 336 | estimated |
| Proofread one page (500 words) | 1.7¢$16.66 / 1,000 | 987 in · 913 out | 291 of 336 | estimated |
| Summarize a 20-page PDF | 6.7¢$66.87 / 1,000 | 18,004 in · 857 out | 308 of 336 | estimated |
| Extract data from an invoice | 1.5¢$15.45 / 1,000 | 546 in · 604 out · 317 reasoning | 297 of 336 | estimated |
| Analyze a 200-row spreadsheet | ≥26¢$256 / 1,000 | 5,433 in · 0 out · 16,000 reasoning | 315 of 336 | estimated |
| Answer from 5 retrieved documents (RAG) | 4.1¢$40.96 / 1,000 | 5,184 in · 1,079 out · 615 reasoning | 309 of 336 | estimated |
| Classify 100 support tickets | 1.3¢$13.36 / 1,000 | 1,747 in · 541 out | 227 of 336 | estimated |
| Review 500 lines of code | 12¢$119 / 1,000 | 7,117 in · 3,067 out · 3,476 reasoning | 297 of 336 | estimated |
| Write a SQL query | 1.6¢$16.40 / 1,000 | 182 in · 839 out · 218 reasoning | 297 of 336 | estimated |
| Run a 50-step coding agent | $1.71$1,711 / 1,000 | 3,101,175 in · 20,790 out · 10,900 reasoning | 276 of 336 | modeled |
Price at every provider
List prices per 1M tokens (input / output) at each host serving Claude Sonnet 4.5 through OpenRouter today. Hosts can differ in quantization, context and speed.
| Provider | Input / output | Cached input | Context | Uptime |
|---|---|---|---|---|
 Claude Platform on AWSunknown | $3.00 / $15.00 | $0.30 | 1M | 100% |
 Azureunknown | $3.00 / $15.00 | $0.30 | 200K | |
 Amazon Bedrockunknown | $3.00 / $15.00 | $0.30 | 1M | 100% |
Anthropicunknown | $3.00 / $15.00 | $0.30 | 1M | 100% |
 Googleunknown | $3.00 / $15.00 | $0.30 | 1M | |
Amazon Bedrockunknown | $3.30 / $16.50 | $0.33 | 1M | |
Googleunknown | $3.30 / $16.50 | $0.33 | 1M |
Price history
First seen in our price history on Oct 1, 2025 at $3.00 input / $15.00 output. The list price has not changed since.
FAQ
How much does Claude Sonnet 4.5 cost?
Claude Sonnet 4.5 costs $3.00 per 1 million input tokens and $15.00 per 1 million output tokens, with cached input at $0.30 (list price on Oct 18, 2026). In practice one chat answer costs about 1.9¢ and summarizing a 20-page PDF about 6.7¢.
Where is Claude Sonnet 4.5 cheapest?
Among 7 providers we track, the lowest list price today is at Claude Platform on AWS: $3.00 input and $15.00 output per 1M tokens.
Is the Claude Sonnet 4.5 cost per task measured or estimated?
Estimated: Claude Sonnet 4.5 was not run directly. Tokens come from Claude Sonnet 5.5 and are rescaled by the tokenizer of Anthropic. Real usage can differ.