GPT-3.5 Turbo 16K
GPT-3.5 Turbo 16K doubles the context window of the standard GPT-3.5 Turbo, allowing up to 16,000 tokens of combined input and output. OpenAI released this variant to address cases where the 4K default was insufficient — such as summarizing longer documents, handling multi-turn conversations with retained history, or processing moderate-length code files — while keeping the cost and speed profile of the GPT-3.5 family.
It trades some reasoning depth compared to GPT-4 variants but remains highly capable for conversational agents, content pipelines, and tasks where throughput and cost matter more than frontier reasoning. The extended context makes it a practical step up for teams hitting limits on the base 3.5 Turbo without moving to higher-cost models.
Key Features
16K token context window — double the standard GPT-3.5 Turbo
Fast inference suitable for high-throughput and latency-sensitive applications
Solid instruction following for templated and structured tasks
Chat completions API compatible with function calling
Cost-effective for large-scale content generation and classification
Ideal Use Cases
Summarizing medium-length reports and meeting transcripts
Multi-turn chatbot applications needing extended conversation memory
Batch content generation for SEO, email, and product copy
Code explanation and simple refactoring across moderate file sizes
Example Prompts for GPT-3.5 Turbo 16K
Technical Specifications
| Provider | OpenAI |
| Category | Text |
| Modality | Text -> Text |
| Context Window | 16,384 tokens |
Frequently Asked Questions
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