Frontier builder · United States

OpenAI

Frontier IC25 · Edition 2026.3 · Evidence reviewed October 8, 2026 UTC

A hosted model and agent platform with published API specifications and pricing.

Selected for a consequential, inspectable general-purpose model contribution. The displayed model is a named representative, not a claim of latest or best performance.

US operating company legal address in San Francisco; not inference geography.

Selected model

GPT-6.1 Sol · gpt-6.1-sol

Standard first-party synchronous API; uncached text tokens, prompt ≤100K.

1,050,000 · Context window

Scope and limitations

• Reasoning tokens occupy context and are billed at output rate; listed max output includes generated reasoning.
• Over 272,000 input tokens the entire request is priced at 2x input and 1.5x output; these rates apply below that threshold.
• Fast processing is 2x Standard. Regional processing adds 10% where available. GPT-6.1 Sol EU data residency has no Fast mode.
• This model selection does not describe OpenAI's separate open-weight model catalog.

Original sources

• Model specs
• Standard pricing
• Reasoning billing
• Service terms and US operating address

Explore the full IC25 tool · Read the field guide in six languages