GPT-6.1 Sol
OpenAI's latest GPT-6 family model. API: $2 input / $10 output per 1M tokens (standard, short context).
Verdict: Builders who want a strong mid-priced default model.
OpenAI API
GPT-6 family models via API.
OpenAI · checked Oct 22, 2026
What it is
OpenAI's API offers GPT-6 Astra, GPT-6.1 Sol, GPT-6 Sol and GPT-6 Luna, plus batch/flex tiers and tools.
Use cases
- →General-purpose app AI
- →Cheap high-volume tasks (Luna)
- →Frontier reasoning (Astra)
Pros
- +Wide model range from tiny to frontier
- +Batch/flex discounts
- +Mature tooling
Cons
- −Long-context pricing is higher
- −Many model names to track
Where it ranks
- #2 Best LLM APIs & Model Routers
Widest range from GPT-6 Luna ($0.10/M input) to GPT-6 Astra; batch discounts.
On the Release Radar
GPT-6 Sol and GPT-6 Luna
OpenAI expanded the GPT-6 family with Sol and the low-cost Luna (API $0.10 / $0.50 per 1M tokens).
Verdict: High-volume, cost-sensitive features (Luna).
FAQ
How much does OpenAI API cost?
Standard, per 1M tokens (short context, input/output): GPT-6 Astra $10/$50, GPT-6.1 Sol $2/$10, GPT-6 Luna $0.10/$0.50. Batch is ~50% off. (As checked on 2026-10-22; confirm on https://developers.openai.com/api/docs/pricing.)
What is OpenAI API best for?
#2 in Best LLM APIs & Model Routers: General-purpose AI features at any budget.
What are the best alternatives to OpenAI API?
Claude API (Anthropic) (Claude models for coding and agents); Gemini API (Gemini models via AI Studio and the Gemini API); OpenRouter (One API for 500+ models across 80+ providers).
Is OpenAI API open source?
No, OpenAI API is a commercial product.