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OpenAI Lists GPT-6.1 Sol Ultrafast for API Use With $12 Input and $60 Output Pricing

October 8, 2026 at 14:36 EDT

Foundation Models
AI Agents
Software Dev & Coding

OpenAI’s documentation now lists GPT-6.1 Sol with an Ultrafast service tier, extending the Sol upgrade beyond its standard-speed launch for ChatGPT Work, Codex and API users. The tier is priced at $12 per million input tokens and $60 per million output tokens for short-context API use, while OpenAI has said Ultrafast can deliver up to 8x faster token generation than standard speed in Codex.

Oct. 8, 2026 · OpenAI

GPT-6.1 Sol gets an Ultrafast lane

The Sol upgrade now has an API Ultrafast tier priced at $12 input and $60 output per million tokens, while Codex generation is described as up to 8x faster than standard speed.

Speed visualized

1xStandard

8xUltrafast in Codex

Each block represents one unit of token-generation speed versus standard mode.

$12Ultrafast input per 1M tokens

$60Ultrafast output per 1M tokens

1.05MToken context window

128KMaximum output tokens

What changes for builders

ModelUse `gpt-6.1-sol` for complex coding, computer use and professional work.

TierSet `service_tier: "ultrafast"` when lower latency is worth the premium.

API pathTool use requires the Responses API; Chat Completions is supported without tools.

Why developers care

The model is positioned near Astra on several complex coding and agent benchmarks at much lower standard cost.

What to watch

Faster token generation does not guarantee every Work or Codex task finishes 8x sooner, because reasoning and tool use can dominate runtime.

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