GPT-3.5 Turbo Instruct API pricing
As of October 22, 2026, OpenAI GPT-3.5 Turbo Instruct costs $1.50 per million input tokens and $2.00 per million output tokens on OpenAI's own API.
GPT-3.5 Turbo Instruct benchmarks and specs · Every OpenAI model's price
- Input, per million tokens$1.50
- Output, per million tokens$2.00
- Cached input, per millionNo cache price listed
- Context window4K tokens
- Max output4K tokens
- Output speedNot measured
What a request costs
Three fixed token mixes at the list price, without cache or batch discounts. For a whole month, use the calculator.
| Workload | Tokens | One request | 1,000 requests | Fits the context window |
|---|---|---|---|---|
| Chat turn | 1K input + 500 output tokens | $0.0025 | $2.50 | Yes |
| Repository review | 50K input + 3K output tokens | $0.081 | $81.00 | No, it would need splitting |
| Agent loop | 200K input + 10K output tokens | $0.320 | $320.00 | No, it would need splitting |
| Solved coding task | One SWE-bench Verified attempt, divided by the share that succeed | Not computable | Not computable |
Price history
We have read OpenAI's own price every day since October 21, 2026. It has not changed yet; any change will be listed here with its date.
- October 21, 2026 First recorded: $1.50 input, $2.00 output
Cheaper models as good as GPT-3.5 Turbo Instruct
GPT-3.5 Turbo Instruct has no overall or coding score, so we make no quality claim against it.
GPT-3.5 Turbo Instruct pricing questions
- How much does GPT-3.5 Turbo Instruct cost per million tokens?
- $1.50 per million input tokens and $2.00 per million output tokens, as listed on OpenRouter on October 22, 2026.
- Does GPT-3.5 Turbo Instruct support prompt caching?
- OpenRouter lists no cached input price for this model, so assume every input token is billed at the full rate.
- Has the price of GPT-3.5 Turbo Instruct changed?
- Not since we started recording it daily on October 21, 2026.