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Anthropic
Claude Opus 4
Released May 22, 2025 · knowledge cutoff 2025-03
- Status
- Deprecated
- Location
- United States
- Type
- LLM
- Modality
- Multimodal
- Context window
- 200K
- Max output
- 32K
- Speed
- —
- Price ($/MTok in / out)
- $15 / $75
- Cost per task
- —
- Open weights
- No
Benchmarks7 of 10 reported
MMLU-Proretired
87.4%
GPQA Diamond
83.3%
SWE-bench Verified
72.5%
AIME (latest)retired
75.5%
Humanity's Last Exam
11.7%
LMArena Elo
1420
ARC-AGI-2
8.6%
SWE-bench Pro
—
Terminal-Bench 2.1
—
GDPval-AA v2
—
Strengths & weaknesses
Strengths
- Runs for hours on one task without losing the thread or looping
- Writes notes to itself and picks work back up across sessions
- Stops and asks when a requirement is ambiguous rather than guessing
Weaknesses
- Slow and deliberate — a poor fit for anything interactive
- Safety classifiers add refusals and latency to security and biology work
Released with Claude Sonnet 4 at the first Code with Claude conference.
For developers
API model strings
- anthropic
claude-opus-4-20250514 - aws-bedrock
anthropic.claude-opus-4-20250514-v1:0 - google-vertex
claude-opus-4@20250514
Licence
Proprietary — weights not released
Retirement
Jun 15, 2026
Lineage
No recorded predecessor