GPT-3.5 Turbo (older v0613)
Summary
GPT-3.5 Turbo (older v0613) is a language model from OpenAI, released on 25 Jan 2024. It accepts text and generates text, with a 4K-token context window and up to 4K output tokens per response. As of 4 Oct 2026, the lowest listed API price is $1 per million input tokens and $2 per million output tokens (OpenRouter), across 1 provider we track.
GPT-3.5 Turbo is OpenAI's fastest model. It can understand and generate natural language or code, and is optimized for chat and traditional completion tasks. Training data up to Sep 2021.
Last verified 4 Oct 2026. Every figure on this page links to its source.
Specifications
| Developer | OpenAI |
|---|---|
| Release date | 25 Jan 2024 [OpenRouter] |
| Status | Generally available |
| Context window | 4K (4,095 tokens) [OpenRouter] |
| Max output | 4K tokens [OpenRouter] |
| Knowledge cutoff | 30 Sept 2021 [OpenRouter] |
| Input | Text [OpenRouter] |
| Output | Text [OpenRouter] |
| Reasoning mode | No [OpenRouter] |
| Tool calling | Yes [OpenRouter] |
| Structured output | Yes [OpenRouter] |
GPT-3.5 Turbo (older v0613) API pricing by provider
USD per million tokens. Sorted by input price.
| Provider | Input | Output | Cached input | Context | Source |
|---|---|---|---|---|---|
| OpenRouter openai/gpt-3.5-turbo-0613 | $1 | $2 | – | 4K | OpenRouter, 4 Oct 2026 |
Frequently asked questions
What is the context window of GPT-3.5 Turbo (older v0613)?
GPT-3.5 Turbo (older v0613) has a context window of 4,095 tokens (4K) and can generate up to 3,685 tokens in a single response, according to OpenRouter.
How much does the GPT-3.5 Turbo (older v0613) API cost?
GPT-3.5 Turbo (older v0613) is listed from $1 per million input tokens and $2 per million output tokens (OpenRouter). Prices last verified 4 Oct 2026.
When was GPT-3.5 Turbo (older v0613) released?
OpenAI released GPT-3.5 Turbo (older v0613) on 25 Jan 2024, according to OpenRouter.
Change history
No changes detected since we started tracking this model. We re-check every source daily.