GPT-5
Original GPT-5 workhorse for reasoning, coding, writing, and tool workflows
ECI STANDING#47 of 266
SCORE150.0
FRONTIER LAGLaunched in the leadNothing released before it had scored higher.
SCORES LIKE THESE MODELSGPT-5 ProOpenAI · Oct 2025150.29
Full Epoch Capabilities Index ranking ↗Inkling-SmallThinking Machines · Jul 2026150.15
Claude Opus 4.5Anthropic · Nov 2025150.11Kimi K2.7 CodeMoonshot · Jun 2026150.07From the lab
Launch announcement · Aug 7, 2025Introducing GPT-5Launch announcement · Aug 7, 2025Introducing GPT-5 for developersRELEASE DATEAug 7, 2025
WEIGHTSClosed weights
CONTEXT WINDOW400K
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.