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GPT-6 Sol

OpenAI · Released Sep 2026

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Conditional

GPT-6 Sol is the lower-priced companion to GPT-6 Astra and succeeds GPT-5.6 Sol at half its per-token rate, with a 1.05M-token context and 128K output. Conditional because every published score is OpenAI's own and prompts over 272K input tokens bill at higher rates. GPT-5.6 Sol stays on the price list with no deprecation notice, so nothing forces a migration. Right for teams routing hard coding and agent work to OpenAI.

Is it right for you?

Good for

  • Cutting frontier spend: $2 input and $10 output per 1M tokens, half GPT-5.6 Sol's $4/$20, with cached input at $0.20
  • Long inputs: a 1,050,000-token context window and up to 128,000 output tokens
  • Agentic coding and computer use, where OpenAI reports 68.8% on DeepSWE v1.1 and 60.5% on OSWorld 2.0 offline
  • Asynchronous jobs: batch runs at $1/$5 per 1M tokens short context

Not good for

  • Starting new Sol work: OpenAI's model page now points to GPT-6.1 Sol as the newer Sol model, at the same $2/$10 with cached input at $0.10 against $0.20
  • Budgeting off the headline rate on long prompts: over 272K input tokens it bills $4 input and $15 output per 1M
  • Decisions that need independent benchmarks: every published score is OpenAI's own
  • Audio or image output: it takes text and images and returns text only

Pricing

Input

$2 / 1M tokens

Output

$10 / 1M tokens

Context

1.05M ctx; over 272K $4/$15; cache $0.20

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Benchmarks

BenchmarkScoreSource
DeepSWE v1.1, max effort (OpenAI-reported)68.8% Source
Agents' Last Exam, max effort (OpenAI-reported)56.4% Source
OSWorld 2.0 offline, xhigh (OpenAI-reported)60.5% Source
AutomationBench, xhigh (OpenAI-reported)33.2% Source

No verdict changes yet

The clock starts day one. Changes land here as our verdict evolves.

Sources

Verification log

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  • Profile· Updated

    Automated agent

    Pricing unchanged ($2/$10, cache $0.20). OpenAI's gpt-6-sol page now says to see GPT-6.1 Sol (released Sep 29 per changelog) for the newer Sol model, at the same $2/$10 with cached input $0.10. No deprecation listed for gpt-6-sol. Strengths/audiences/sources refreshed; summary rewrite staged for publish; draft news created.

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How we evaluate