Claude Opus 4 vs Claude Opus 4.8 (Fast)
How do these models stack up? Below is an expert side-by-side comparison of specifications, context window capacity, live pricing per million tokens, and standardized benchmark scores for Claude Opus 4 and Claude Opus 4.8 (Fast).
Claude Opus 4
Claude Opus 4 is benchmarked as the world’s best coding model, at time of release, bringing sustained performance on complex, long-running tasks and agent workflows. It sets new benchmarks in...
Claude Opus 4.8 (Fast)
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
Technical Specifications
| Specification | Claude Opus 4 | Claude Opus 4.8 (Fast) |
|---|---|---|
| Provider | Anthropic | Anthropic |
| Context Window | 200,000 tokens | 1,000,000 tokens |
| Agent Suitability | N/A | N/A |
| Time to First Token (TTFT) | N/A | N/A |
| Deployment Model | managed api | managed api |
| Production Stability | stable | beta |
| API Available | Yes | Yes |
| Released Date | 2025-05-22 | 2026-05-27 |
API Pricing Comparison
Input Price per Million Tokens
Claude Opus 4
$15.00
Claude Opus 4.8 (Fast)
$10.00
Output Price per Million Tokens
Claude Opus 4
$75.00
Claude Opus 4.8 (Fast)
$50.00
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Benchmark Performance Metrics
Scores show the raw performance percentages verified across key evaluation suites. Higher bars indicate superior accuracy and capability in that domain.
Claude Opus 4 Quirks & Gotchas
No developer gotchas reported.
Claude Opus 4.8 (Fast) Quirks & Gotchas
No developer gotchas reported.