GPT-3.5 Turbo 16k
$3.00 per 1M input tokens and $4.00 per 1M output tokens · 16K context · tools, JSON.
Prices checked Oct 21, 2026 · tracked by LLM Cost Index since Oct 21, 2026
What GPT-3.5 Turbo 16k costs per month
Estimated monthly bill for typical workloads. Try your own numbers in the cost calculator.
| Workload | Per month |
|---|---|
| Customer chatbot 1,000 conversations a day, 8 turns each | $1,416 |
| Document Q&A (RAG) 500 questions a day over retrieved documents | $300 |
| Coding / tool-using agent 200 tasks a day, long tool-heavy contexts | $1,176 |
| Content generation 30 long articles a day | $17.10 |
| Classification / extraction 100,000 short items a day | $2,880 |
Price history
We started tracking GPT-3.5 Turbo 16k on Oct 21, 2026; the chart appears as soon as there is a second data point. See all recent price changes.
Where to run GPT-3.5 Turbo 16k: 2 providers
Azure is the cheapest at $3.00 input / $4.00 output per 1M tokens. Uptime is the average over the last 30 days as reported by OpenRouter; see provider reliability.
Cheaper alternatives to GPT-3.5 Turbo 16k
Models with the same tool calling, structured output for at least 20% less (3:1 input/output mix), most capable first.
| Model | Input / 1M | Output / 1M | Context | Capabilities |
|---|---|---|---|---|
| Muse Spark 1.3 Meta | $1.25 | $4.25 | 1.05M | visiontoolsreasoningJSON |
| MiMo-V2.6-Pro Xiaomi | $0.435 | $0.87 | 1.05M | visionaudiotoolsreasoningJSONopen weights |
| GLM 5.3 Z.ai | $0.079 | $1.40 | 1.05M | toolsreasoningJSONopen weights |
| Step 5 Preview Stepfun | $1.00 | $2.70 | 1.05M | visiontoolsreasoningJSONopen weights |
| Claude Haiku 5.5 Anthropic | $0.10 | $0.50 | 1M | visiontoolsreasoningJSON |
How to pay less for GPT-3.5 Turbo 16k
For a customer chatbot (1,000 conversations a day, 8 turns each) that costs $1,416 a month at list price without caching:
| Option | Per month | You save |
|---|---|---|
| Move to Muse Spark 1.3 (similar capabilities) | $569 | $847 (60%) |
Other workloads: cut-your-bill tool for GPT-3.5 Turbo 16k.
Specifications
| Model ID | openai/gpt-3.5-turbo-16k |
| Input | text |
| Output | text |
| Tool calling | Yes |
| Structured output | Yes |
| Reasoning mode | No |
| Open weights | No |
| Knowledge cutoff | 2021-09-30 |
| Released | Aug 28, 2023 |
FAQ
- How much does GPT-3.5 Turbo 16k cost?
- $3.00 per million input tokens and $4.00 per million output tokens. Prices as of Oct 21, 2026.
- What is the context window of GPT-3.5 Turbo 16k?
- 16K tokens, with up to 4K output tokens per response.
- Does GPT-3.5 Turbo 16k support images, tools and structured output?
- Images as input: no. Tool calling: yes. Structured (JSON) output: yes. Reasoning mode: no.
- What are cheaper alternatives to GPT-3.5 Turbo 16k?
- Models with the same key capabilities for at least 20% less include Muse Spark 1.3 ($1.25 / $4.25), MiMo-V2.6-Pro ($0.435 / $0.87), GLM 5.3 ($0.079 / $1.40).
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