GPT-6.1 Sol

GPT-6.1 Sol updates OpenAI's Sol line with near-Astra performance, lower cache-read pricing, and Multi-agent beta.

OpenAI · Frontier/foundation models · model

Published in Feed

Overview

OpenAI launched GPT-6 Sol on September 22, 2026 and released GPT-6.1 Sol on September 29 as the current Sol model for complex coding, computer use, and professional work. GPT-6.1 Sol has a 1,050,000-token context window, 128,000 max output tokens, and low-through-max reasoning effort; tool calling uses the Responses API. It supports Multi-agent delegation in beta and is available in the API, Codex, and ChatGPT Work subject to account and workspace access. The model's standard short-context price is $2 per million input tokens, $0.10 cached input tokens, and $10 output tokens; the cache-read rate is lower than GPT-6 Sol's $0.20 rate.

This is a sourced directory entry. Features and capabilities are reported in the linked sources; this entry does not document independent Aymorphic testing.

Key features

  • 1,050,000-token context window, 128,000 max output tokens
  • Configurable reasoning effort from low through max
  • Supports streaming, structured outputs, function calling, file search, image input, web search, and prompt caching
  • Responses API tool support: web search, file search, image generation, code interpreter, computer use, hosted shell, patch application, MCP
  • Multi-agent delegation in beta through the Responses API
  • Requests over 272K input tokens billed at 2x input/cache and 1.5x output rates

Use cases

  • Interactive and agentic coding tasks
  • Multistep validation workflows that need careful, sustained reasoning
  • Codex and GitHub Copilot coding sessions
  • Cost-sensitive agentic tasks that previously required Astra-tier pricing

Pricing

GPT-6.1 Sol standard short-context API pricing: $2/million input tokens, $10/million output, $0.10/million cached input, $2.50/million cache writes. Rates rise for prompts over 272K input tokens.

Pricing reflects the source record and may change. Confirm current terms with the provider.

Dates and sources

Released
22 Sept 2026
Record updated
1 Oct 2026
Record last checked
1 Oct 2026

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