# GPT-3.5 Turbo (older v0613)

> 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.

Source page: https://www.aimodel.directory/models/gpt-3-5-turbo-0613
Last verified: 4 Oct 2026

## Specifications

- **Developer:** OpenAI
- **Release date:** 25 Jan 2024 (source: OpenRouter, https://openrouter.ai/openai/gpt-3.5-turbo-0613)
- **Status:** Generally available
- **Context window:** 4K (4,095 tokens) (source: OpenRouter, https://openrouter.ai/openai/gpt-3.5-turbo-0613)
- **Max output:** 4K tokens (source: OpenRouter, https://openrouter.ai/openai/gpt-3.5-turbo-0613)
- **Knowledge cutoff:** 30 Sept 2021 (source: OpenRouter, https://openrouter.ai/openai/gpt-3.5-turbo-0613)
- **Input:** Text (source: OpenRouter, https://openrouter.ai/openai/gpt-3.5-turbo-0613)
- **Output:** Text (source: OpenRouter, https://openrouter.ai/openai/gpt-3.5-turbo-0613)
- **Reasoning mode:** No (source: OpenRouter, https://openrouter.ai/openai/gpt-3.5-turbo-0613)
- **Tool calling:** Yes (source: OpenRouter, https://openrouter.ai/openai/gpt-3.5-turbo-0613)
- **Structured output:** Yes (source: OpenRouter, https://openrouter.ai/openai/gpt-3.5-turbo-0613)

## API pricing (USD per 1M tokens)

| Provider | Input | Output | Cached input | Context |
|---|---|---|---|---|
| OpenRouter | $1 | $2 | – | 4K |

## FAQ

### 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.

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Data licensed CC BY 4.0. Cite as: AI Model Directory, "GPT-3.5 Turbo (older v0613)", https://www.aimodel.directory/models/gpt-3-5-turbo-0613