GPT-3.5 Turbo 16k
VerifiedOpenAI's efficient LLM for extended text conversations and tasks.
About GPT-3.5 Turbo 16k
Designed as an iteration on the GPT-3.5 series, this model incorporates a significantly larger context window to handle more extensive inputs. It maintains the efficiency and speed associated with the Turbo variant. OpenAI developed it to support applications where conversation history or document length is substantial.
Its strengths lie in balancing performance with accessibility for developers building text-based AI solutions. Being closed-weight, it is accessed via API rather than local deployment. This setup ensures consistent updates and optimizations from the provider.
Typical usage includes powering chat interfaces, generating summaries of long texts, and assisting with coding or analysis tasks that benefit from broader context. Users integrate it into applications requiring reliable natural language understanding and generation. The model supports a wide range of professional and creative workflows.
Capabilities
How GPT-3.5 Turbo 16k compares
GPT-3.5 Turbo 16k (striped bar) vs other language models on intelligence, speed and price.
Price
USD per 1M output tokens · Lower is better · GPT-3.5 Turbo 16k ranks #127 of 141
Sources: Artificial Analysis (intelligence, speed) · OpenRouter (price).
Best for
Long-context document summarization
The model processes inputs up to 16385 tokens to condense lengthy reports, articles, or transcripts while preserving key details.
Code generation and debugging
It generates functional code snippets and identifies issues in existing scripts through step-by-step conversational guidance.
Creative writing assistance
Users receive help drafting stories, marketing copy, or dialogue by iterating on prompts with coherent, context-aware suggestions.
Strengths & limitations
Strengths
- +Fast and cost-efficient responses
- +Reliable for everyday language tasks
- +Handles moderately long documents
- +Strong at structured output formats
Limitations
- –Knowledge cutoff in 2021
- –Weaker complex reasoning than newer models
- –Text-only modality
Cost calculator
Estimate what GPT-3.5 Turbo 16k would cost for your usage.
Based on GPT-3.5 Turbo 16k's $3.00/1M input · $4.00/1M output. Estimate only — actual cost varies by provider and caching.
Quick start
OpenRouter's API is OpenAI-compatible — most SDKs work by just swapping the base URL. Only the model slug changes between models.
import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://openrouter.ai/api/v1",
apiKey: process.env.OPENROUTER_API_KEY,
});
const completion = await client.chat.completions.create({
model: "openai/gpt-3.5-turbo-16k",
messages: [{ role: "user", content: "Hello!" }],
});
console.log(completion.choices[0].message.content);Model slug: openai/gpt-3.5-turbo-16k
Editor's verdict
GPT-3.5 Turbo 16k is OpenAI's proprietary language models with a 16K-token context window.
At $4.00 per 1M output tokens, it is mid-priced for its class.
It is available through OpenAI's API and aggregators like OpenRouter.
Best suited to fast and cost-efficient responses and reliable for everyday language tasks.
Frequently asked questions
The model supports a maximum context length of 16385 tokens as specified by OpenAI.
User reviews
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