GPT-5.4 Pro
More exact GPT-5.4 tier for demanding professional reasoning and agent tasks
ECI STANDING#9 of 266
SCORE158.95156.73–161.7 CI
FRONTIER LAGLaunched in the leadNothing released before it had scored higher.
SCORES LIKE THESE MODELSGPT-5.6 TerraOpenAI · Jul 2026159.14GPT-5.5OpenAI · Apr 2026159.12Claude Opus 4.8Anthropic · May 2026158.3Kimi K3Moonshot · Jul 2026157.63
Full Epoch Capabilities Index ranking ↗RELEASE DATEMar 5, 2026
WEIGHTSClosed weights
CONTEXT WINDOW1.05M
MAX OUTPUT128K
REASONINGYes
TOOL CALLINGYes
INPUTStext, image
OUTPUTStext
Specifications from Models.dev. Availability and limits may differ by provider. Benchmark scores come from Epoch AI under CC BY 4.0.