GPT-4 Turbo
Summary
GPT-4 Turbo is a proprietary language model from OpenAI, released on 6 Nov 2023. It accepts text and images and generates text, with a 128K-token context window and up to 4K output tokens per response. As of 4 Oct 2026, the lowest listed API price is $10 per million input tokens and $30 per million output tokens (OpenRouter), across 1 provider we track. OpenAI has deprecated this model.
Compact GPT model for low-latency assistance and high-volume workloads
Last verified 4 Oct 2026. Every figure on this page links to its source.
Specifications
| Developer | OpenAI |
|---|---|
| Release date | 6 Nov 2023 [models.dev] |
| Status | Deprecated [models.dev] |
| Weights | Proprietary (API only) [models.dev] |
| Context window | 128K (128,000 tokens) [models.dev] |
| Max output | 4K tokens [models.dev] |
| Knowledge cutoff | Dec 2023 [models.dev] |
| Input | Text and images [models.dev] |
| Output | Text [models.dev] |
| Reasoning mode | No [models.dev] |
| Tool calling | Yes [models.dev] |
| Structured output | No [models.dev] |
GPT-4 Turbo API pricing by provider
USD per million tokens. Sorted by input price.
| Provider | Input | Output | Cached input | Context | Source |
|---|---|---|---|---|---|
| OpenRouter openai/gpt-4-turbo | $10 | $30 | – | 128K | OpenRouter, 4 Oct 2026 |
Frequently asked questions
What is the context window of GPT-4 Turbo?
GPT-4 Turbo has a context window of 128,000 tokens (128K) and can generate up to 4,096 tokens in a single response, according to models.dev.
How much does the GPT-4 Turbo API cost?
GPT-4 Turbo is listed from $10 per million input tokens and $30 per million output tokens (OpenRouter). Prices last verified 4 Oct 2026.
Is GPT-4 Turbo open source?
No. GPT-4 Turbo is a proprietary model; OpenAI has not released its weights. It is available through APIs including OpenRouter.
When was GPT-4 Turbo released?
OpenAI released GPT-4 Turbo on 6 Nov 2023, according to models.dev.
Change history
No changes detected since we started tracking this model. We re-check every source daily.