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.
Added Sep 22, 2026
Context Window
1.1M
Max Output
128.0K
Avg output tokens (7d)
473 tokens
Input Price (Auto)
$2.00/1M
Output Price (Auto)
$10.00/1M
Cache Read (Auto)
$0.20/1M
Capabilities
Benchmarks
Benchmarks
Performance metrics and benchmarks
Sourced from Artificial Analysis.
Intelligence Index
39.8
Agentic work
AutomationBench-AA
Workflow automation with guardrail penalties
58.0%
Better than 82% of models compared
AA-Briefcase
Agentic knowledge work (Elo)
1150 Elo
Better than 60% of models compared
GDPval-AA v2
Economically valuable tasks (Elo)
1347 Elo
Better than 73% 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 89% of models compared
CritPt
Research-level physics reasoning
30.9%
Coding
Terminal-Bench v4.0
Practical coding and terminal tasks
18.7%
Better than 73% of models compared
SciCode
Python programming for scientific computing
53.8%
Better than 70% of models compared
Knowledge
AA-Omniscience Accuracy
Proportion of correctly answered questions
54.5%
AA-Omniscience Hallucination Rate
Rate of incorrect answers among non-correct responses
60.1%
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
49.3%
Last updated Oct 1, 2026
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Compare GPT 6 Sol with similar models from the same provider or model family.
GPT 6 Sol Pro
openai/gpt-6-sol-proGPT-6 Sol Pro uses the same underlying model as GPT-6 Sol with Pro reasoning mode enabled for higher-quality responses on complex tasks.
GPT Sol Latest
openai/gpt-sol-latestCompatibility alias that routes to GPT 5.6 Sol, the latest supported GPT Sol model.
GPT 5.6 Sol
openai/gpt-5.6-solGPT-5.6 Sol is the flagship model in OpenAI's GPT-5.6 series. It is suited for complex reasoning, coding, agentic workflows, command-line work, and multi-step professional tasks.
GPT 5.6 Sol Pro
openai/gpt-5.6-sol-proGPT-5.6 Sol with Pro reasoning mode. Pro mode performs more model work for difficult tasks; reasoning effort remains independently configurable and defaults to medium.
GPT Astra Latest
openai/gpt-astra-latestCompatibility alias that routes to GPT 6 Astra, the latest supported GPT Astra model.
GPT Luna Latest
openai/gpt-luna-latestCompatibility alias that routes to GPT 5.6 Luna, the latest supported GPT Luna model.