Claude Opus 4.8 (Fast)
by Anthropic · anthropic/claude-opus-4.8-fast · #314 cheapest of 325 paid models
Prices updated Jul 22, 2026, 2:40 AM UTC · refreshed hourly
Fast-mode variant of [Opus 4.8](/anthropic/claude-opus-4.8) - identical capabilities with higher output speed at 2x pricing relative to regular Opus 4.8. Learn more in Anthropic's docs: https://platform.claude.com/docs/en/build-with-claude/fast-mode
Compare vs:GPT-5.6 SolGPT-5.6 TerraGPT-4.1GPT-4.1 Mini
Pricing
Input
$10.00
per 1M tokens
Output
$50.00
per 1M tokens
Blended (3:1)
$20.00
3 input : 1 output
Cache read
$1.00
per 1M cached tokens
Cache write
$12.50
per 1M tokens
Cache & batch economics
Effective prices for Claude Opus 4.8 (Fast) with prompt caching.
| Cache hit rate | Effective blended $/1M | Example request* | vs no cache |
|---|---|---|---|
| 0% | $20.00 | $1.07 | — |
| 50% | $16.63 | $0.62 | −42% |
| 90% | $13.93 | $0.26 | −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 | $0.02 | $20.00 |
| Document summary | 8,000 | 1,000 | $0.13 | $130.00 |
| Codebase question (RAG) | 30,000 | 2,000 | $0.4 | $400.00 |
| Long-context analysis | 150,000 | 5,000 | $1.75 | $1,750 |
Specs
Context window
1M
tokens
Max output
128K
tokens
Input modalities
text, image, file
Tokenizer
Claude