GPT-5.6 Sol
Frontier GPT-5.6 model for complex professional work, coding, and agentic workflows
ECI STANDING#6 of 266
SCORE161.81159.57–165.2 CI
FRONTIER LAGLaunched 2.5 months behindScores about what GPT-5.5 Pro did in April 2026.
SCORES LIKE THESE MODELSClaude Fable 5.1Anthropic · Sep 2026164.47Claude Fable 5Anthropic · Jun 2026163.27Claude Opus 5Anthropic · Jul 2026162.3GPT-5.5 ProOpenAI · Apr 2026162.25
Full Epoch Capabilities Index ranking ↗From the lab
Launch announcement · Jul 9, 2026GPT-5.6: Frontier intelligence that scales with your ambitionRelated article · Jun 26, 2026Previewing GPT-5.6 Sol: a next-generation modelRELEASE DATEJul 9, 2026
WEIGHTSClosed weights
CONTEXT WINDOW1.05M
MAX OUTPUT128K
REASONINGYes
TOOL CALLINGYes
INPUTStext, image, pdf
OUTPUTStext
Specifications from Models.dev. Availability and limits may differ by provider. Benchmark scores come from Epoch AI under CC BY 4.0.