GPT 6 Sol

GPT-6 Sol is the cost-efficient high-end model in OpenAI's GPT-6 series, positioned below the flagship GPT-6 Astra and above the fast GPT-6 Luna tier. It is suited for demanding professional work, reasoning, coding, and agentic workflows.

Reasoning
Vision
Native PDF input
Tool Calling
Structured Output

Added Sep 22, 2026

Pricing

Auto routing · per 1M tokens

Input: $2.00
Output: $10.00
Cache read: $0.20

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Specifications

Context window: 1.1M
Max output: 128K
Avg output (7d): 448 tokens; Longer than 41% of models

Benchmarks

Artificial Analysis

Vectara

Design Arena

Sourced from Artificial Analysis.

Intelligence Index

39.8

Better than 92% of models compared

Agentic work

AutomationBench-AA

Workflow automation with guardrail penalties

58.0%

Better than 81% of models compared

AA-Briefcase

Agentic knowledge work (Elo)

1150 Elo

Better than 60% of models compared

GDPval-AA v2

Economically valuable tasks (Elo)

1350 Elo

Better than 71% of models compared

Document reasoning

GDP.pdf

Professional PDF reasoning: all-pass rate

23.8%

Better than 81% of models compared

AA-LCR v1.1

Long context reasoning with updated grading

82.3%

Better than 93% of models compared

Reasoning

HLE

Humanity's Last Exam

41.0%

Better than 88% of models compared

CritPt

Research-level physics reasoning

4.0%

Coding

Terminal-Bench v4.0

Practical coding and terminal tasks

18.7%

Better than 72% of models compared

SciCode

Python programming for scientific computing

53.8%

Better than 69% of models compared

Knowledge

AA-Omniscience Accuracy

Proportion of correctly answered questions

45.2%

AA-Omniscience Hallucination Rate

Rate of incorrect answers among non-correct responses

84.0%

Legacy benchmarks

AA-LCR (unversioned / legacy)

Long context reasoning evaluation

82.3%

Better than 93% of models compared

GDPval-AA (unversioned / legacy)

Economically valuable tasks

37.4%

Last updated Oct 13, 2026