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GPT-6.1 Sol

OpenAI's mid-tier GPT-6 model with a 1.05-million token context, image input and multi-agent support in beta

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About GPT-6.1 Sol

GPT-6.1 Sol is a model OpenAI released on 29 September 2026, available through its Responses and Chat Completions APIs under the model ID gpt-6.1-sol. OpenAI describes it as a balance of intelligence and cost. OpenAI's own benchmarks are preliminary, and an independent index placed it below both Claude Sonnet 5.5 and Claude Opus 5.5.

Features

  • Reasoning effort: five settings, from low to max, to trade depth against cost and speed.
  • Hosted tools: web and file search, code interpreter, computer use and MCP.
  • Multi-agent delegation: delegation to sub-agents, offered as a beta feature.
  • Input and output: text and image input, with text output.
  • Data residency: US and EU options, though the faster tier is not available with EU residency.

Customers and markets

Developers and business users with access to the API, and paying ChatGPT Work and Codex users.

Key facts

  • Developer: OpenAI.
  • Context window: 1.05 million tokens, with up to 128,000 output tokens.
  • Knowledge cutoff: April 2026.
  • Model ID: gpt-6.1-sol.

Profile written by TrustList from the business's own published information, Oct 2026.

Benchmarks & AI stats

AI model rankings
BenchmarkOfficialCommunity avg
Artificial Analysis Intelligence Index v4.3.2llm52 index-

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