#08Anthropic· released 2026-05-27

Anthropic: 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

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Context
1.0M
Input $/1M
$10.00
Output $/1M
$50.00
Modality
text · image · file

Benchmarks

How these are aggregated →
Arena Elo
1548
LMArena — human blind votes
AA Index
67.0
Artificial Analysis composite
LiveBench
80.1
Contamination-resistant
GPQA
87.6%
Grad-level science reasoning
MMLU-Pro
88.4%
Broad knowledge
SWE-bench
74.9%
Real GitHub bugs (Verified)
Terminal-Bench
52.7%
Agentic shell tasks
ARC-AGI
19.6%
Abstract reasoning
Aider Polyglot
82.8%
Multi-language code editing
Speed
82 tok/s
Median output speed

Nearby on the leaderboard