Claude Opus 4.7

Stronger Opus tier for advanced software work and high-stakes reasoning

ECI STANDING#18 of 266
SCORE156.34154.57–158.5 CI
FRONTIER LAGLaunched 2.3 months behindScores about what GPT-5.3 Codex did in February 2026.
Full Epoch Capabilities Index ranking

From the lab

Launch announcement · Apr 16, 2026Released Claude Opus 4.7
RELEASE DATEApr 16, 2026
WEIGHTSClosed weights
CONTEXT WINDOW1M
MAX OUTPUT128K
REASONINGYes
TOOL CALLINGYes
INPUTStext, image, pdf
OUTPUTStext

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