Claude Sonnet 4.5 (batch)
by Anthropic · anthropic/claude-sonnet-4.5:batch · #322 cheapest of 422 paid models
Prices updated Sep 19, 2026, 6:21 PM UTC · refreshed hourly
Claude Sonnet 4.5 is Anthropic’s most advanced Sonnet model to date, optimized for real-world agents and coding workflows. It delivers state-of-the-art performance on coding benchmarks such as SWE-bench Verified, with...
Compare vs:GPT-5.6 SolGPT-5.6 TerraGPT-4.1GPT-4.1 Mini
Pricing
Input
$1.50
per 1M tokens
Output
$7.50
per 1M tokens
Blended (3:1)
$3.00
3 input : 1 output
Cache read
$0.15
per 1M cached tokens
Cache write
$1.88
per 1M tokens
Cache & batch economics
Effective prices for Claude Sonnet 4.5 (batch) with prompt caching.
| Cache hit rate | Effective blended $/1M | Example request* | vs no cache |
|---|---|---|---|
| 0% | $3.00 | $0.1605 | — |
| 50% | $2.49 | $0.093 | −42% |
| 90% | $2.09 | $0.039 | −76% |
*Example: 100K sticky context + 2K new input + 1K output. Batch discount is an approximate 50% off list rates for this provider’s batch API. Confirm on the vendor’s pricing page.
What a request costs
| Workload | Input tokens | Output tokens | Cost / request | Cost / 1K requests |
|---|---|---|---|---|
| Short chat message | 500 | 300 | $0.003 | $3.00 |
| Document summary | 8,000 | 1,000 | $0.0195 | $19.50 |
| Codebase question (RAG) | 30,000 | 2,000 | $0.06 | $60.00 |
| Long-context analysis | 150,000 | 5,000 | $0.2625 | $262.50 |
Performance
Intelligence Index
21.2
AA composite quality
Coding Index
52.1
Math Index
—
Agentic Index
17.5
Output speed
—
median
Time to first token
—
median
Time to first answer
—
after reasoning tokens
Design Arena Elo
| Category | Elo |
|---|---|
| Website | 1,202 |
| Web apps | 1,075 |
| Full-stack | 1,060 |
| Mobile apps | 1,166 |
| UI components | 1,188 |
| Data viz | 1,182 |
| SVG | 1,139 |
| 3D | 1,186 |
| Game dev | 1,190 |
| Code categories | 1,198 |
| ASCII art | 1,224 |
Specs
Context window
1M
tokens
Max output
64K
tokens
Input modalities
text, image, file
Tokenizer
Claude