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Anthropic

Claude Opus 4.8

  • Released
  • Closed weights
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Intelligence Index

Max setting

41.8
Measured · Artificial Analysis v4.3.2
API price from
$5.00 in / $25.00 out / 1M tokAnthropic · direct API
Context window
1M tok

Performance profile

ReasoningArchived source
92.0%
GPQA Diamond
CodingArchived source
54.4%
SciCode
Cost efficiencyArchived source
10.2pts / $
Intelligence ÷ eval cost

Capabilities

Context window

Modalities

Reasoning modes

Integration

Reasoning trade-offs

Source (opens in a new tab)
Intelligence Index v4.3.2
Claude Opus 4.8
Cost per task (USD) · log scale
Claude Opus 4.8Max
Intelligence Index
41.8
Cost / task
$4.08
Evaluation time
12.5m

Pricing & access

API route
AnthropicAPI
Tier & context

USD per 1M tokens

Input
$5.00
Output
$25.00
Cached input
$0.50

API billing

Pricing for Claude Code (opens in a new tab)

Benchmarks

Full leaderboardSource (opens in a new tab)

Humanity’s Last Exam

Frontier reasoning

Claude Opus 4.8 · MaxArchived

  1. 1Claude Opus 5.5Max61.4%
  2. 2Claude Fable 5.1Max59.1%
  3. 3Gemini 4 ArgonHigh57.1%
  4. 4Claude Sonnet 5.5Max55.0%
  5. 5GPT-6 AstraMax54.7%
  6. 6Muse Wonder FullMax53.6%
  7. 7GPT-6.1 SolMax52.9%
  8. 8Muse WonderMax50.1%
  9. 9MiMo-V2.6-ProReasoning49.4%
  10. 10Muse Spark 1.3Max48.7%

Peers use their best measured result on this benchmark.