OpenAI · Workhorse

GPT-6.1 Sol API pricing and specs

OpenAI's coding and professional-work model, released a week after GPT-6 Sol with the cached-input price halved and subagent delegation in beta.

Input

⁨$2⁩

Cached input

⁨$0.10⁩

Output

⁨$10⁩

US dollars per million tokens, standard tier, short-prompt rate

OpenAI positions Sol near Astra's quality at a fifth of the price. Reasoning effort runs from low to max with medium as default. Cache writes cost $2.50 per million and Fast mode doubles the rate, but Fast mode is not offered with EU data residency.

Prompts over 272K tokens are billed at ⁨$4⁩ input, ⁨$0.20⁩ cached and ⁨$15⁩ output per million, and the higher rate applies to the whole request.

Spec sheet

API model string: gpt-6.1-sol
Provider: OpenAI
Context: 1.05M tokens
Max output: 128K tokens
Released: September 29, 2026
Batch API: 50% off, results within hours
Documented agent features: Tool callingStructured outputComputer useRemote MCPAdjustable reasoning

What a task costs

Four reference workloads priced at this model's list rates, with caching applied after the first call. Your numbers will differ; the calculator lets you change every assumption.

Workload	Per task	Per 1,000 tasks
Support bot 4 calls, short tool lookups	⁨$0.054⁩	⁨$54⁩
Coding agent 30 calls, files and test output	⁨$1.69⁩	⁨$1,694⁩
Browser agent 25 calls, screenshots and page text	⁨$1.31⁩	⁨$1,313⁩
Research agent 15 calls, long search results	⁨$1.27⁩	⁨$1,274⁩