Cheapest GPT Models
As of October 21, 2026, among LiteLLM's active models with a 32K-token context window or more, offered by at least two providers or by their own lab, the cheapest of the GPT models is GPT-5, at $3.438 per 1M tokens (blended), from OpenAI.
Top 6
Sorted by blended price: 3 input tokens for every output token, at each model's headline price (its own lab's API where it sells it, otherwise its cheapest provider). Only GPT models. Only active models with a 32K-token context window or more, offered by at least two providers or by their own lab. Free models are left out.
| # | Model | Lab | Blended price per 1M tokens | Price per 1M (in / out) | Context | Providers | Price from |
|---|---|---|---|---|---|---|---|
| 1 | GPT-5 | OpenAI | $3.438 | $1.25 / $10.00 | 272K | 8 | OpenAI |
| 2 | GPT-4.1 | OpenAI | $3.50 | $2.00 / $8.00 | 1M | 6 | OpenAI |
| 3 | GPT-5.2 | OpenAI | $4.813 | $1.75 / $14.00 | 272K | 6 | OpenAI |
| 4 | GPT-5.4 | OpenAI | $5.625 | $2.50 / $15.00 | 1M | 9 | OpenAI |
| 5 | GPT-5.6 | OpenAI | $8.00 | $4.00 / $20.00 | 922K | 2 | OpenAI |
| 6 | GPT-5.5 | OpenAI | $11.25 | $5.00 / $30.00 | 1M | 10 | OpenAI |