OpenAI: GPT-3.5 Turbo 16k
Analysis Summary
OpenAI's GPT-3.5 Turbo 16k was a 2023 variant offering a larger context window than the base GPT-3.5 Turbo. It supports tool use and function calling, which gives it some structured task capability, but it has no benchmark data and its underlying reasoning capability is well below current-generation models. At $3.00/1M input and $4.00/1M output, it is significantly more expensive than GPT-3.5 Turbo despite offering only a larger context window.
For businesses, this model is obsolete. The 16K context window was meaningful in 2023 but is now a minimum expectation rather than a differentiator. Models with 128K to 1M token contexts are widely available at lower cost with far better reasoning and coding performance.
Any team still using this model should migrate. The cost-to-capability ratio is poor, and there are no workloads where it would be the preferred choice over current alternatives from OpenAI or other providers.
Assessed June 6, 2026
Editorial notes
GPT-3.5 Turbo 16k is a legacy OpenAI model with no benchmark data, tool use and function calling support, but pricing at $3/1M input that is uncompetitive against far more capable current-generation alternatives.
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Performance Profile
How OpenAI: GPT-3.5 Turbo 16k compares
Its 16K-token context window is larger than 26% of the models we list. At $3.00 per million input tokens it is cheaper than 10% of comparable models.
About OpenAI: GPT-3.5 Turbo 16k
This model offers four times the context length of gpt-3.5-turbo, allowing it to support approximately 20 pages of text in a single request at a higher cost. Training data: up..
Capabilities
How does OpenAI: GPT-3.5 Turbo 16k stack up?
Compare side-by-side with other legacy models.
Model Information
Pricing
| Token Type | Cost per 1M tokens | Cost per 1K tokens |
|---|---|---|
| Input | $3.00 | $0.003000 |
| Output | $4.00 | $0.004000 |
Live Performance
Live endpoint metrics, refreshed every 30 minutes.
External Resources
Frequently asked questions about OpenAI: GPT-3.5 Turbo 16k
How much does OpenAI: GPT-3.5 Turbo 16k cost?
OpenAI: GPT-3.5 Turbo 16k costs $3.00 per million input tokens and $4.00 per million output tokens.
What is the context window of OpenAI: GPT-3.5 Turbo 16k?
OpenAI: GPT-3.5 Turbo 16k has a context window of 16,385 tokens (16K).
What can OpenAI: GPT-3.5 Turbo 16k do?
OpenAI: GPT-3.5 Turbo 16k supports tool use and function calling.
Who created OpenAI: GPT-3.5 Turbo 16k?
OpenAI: GPT-3.5 Turbo 16k is developed by OpenAI and was released on August 28, 2023.
