← Claude Opus 4.8 · API · High effort (default)
Evidenceacceptedproduct_spec
Official model specification
Anthropic Models overview — Claude Opus 4.8
ev_2026_07_opus48_spec
Result
1000000
Confidence S
- Tested
- 2026-07-11
Configuration
How it was measured
- Exact model
- claude-opus-4-8
- Reasoning
- high
- Tool access
- tool_use_supported
- Prompting
- n/a
Caveats
Known limitations
- Context size ≠ long-context competence.
Weighting
Evidence weight factors
The engine weights each evidence row by these factors (0–1) when fusing scores — higher is more trusted.
relevance1.00
quality0.70
recency1.00
health1.00
comparability1.00
reliability1.00
Benchmark
Official model specification
Official context window, modalities, reasoning modes, and API identifiers.
Benchmark source →