Ways to buy 1
| Way to buy | Input | Output | In / out per 1M | Cached | Vs list |
|---|---|---|---|---|---|
 OpenAI APIThe lab's own API | $0.5 | $1.5 | $0.5 / $1.5List price | n/a | List price |
USD per 1M tokens; batch $0.25 in, $0.75 out on the lab's API. Regions are separate routes.
Through a gateway
Your own numbers100M input and 20M output tokens a month: $80.00 direct.
Helicone$80.00+0%
Kong AI Gateway$80.00+0%
LiteLLM$80.00+0%
Vercel AI Gateway$80.00+0%
Cloudflare AI Gateway$84.00+5%
Requesty$84.00+5%
Eden AI$84.40+5.5%
OpenRouter$84.40+5.5%
No published token fee: Martian Gateway, Portkey, TrueFoundry AI Gateway.
Related models
| In / out per 1M | Cheapest route | ||||||
|---|---|---|---|---|---|---|---|
| GPT-6 Luna OpenAI · 1.05MCheapest: $0.1 on OpenAI (flex) | $0.1 | $0.5 | $0.1 / $0.5 | $0.2 | 1.05M | $0.1 on OpenAI (flex) | · |
| GPT-6 Luna Pro OpenAI · 1.05MCheapest: $0.1 on OpenAI (flex) | $0.1 | $0.5 | $0.1 / $0.5 | $0.2 | 1.05M | $0.1 on OpenAI (flex) | · |
| GPT-6 Sol OpenAI · 1.05MCheapest: $2 on OpenAI (flex) | $2 | $10 | $2 / $10 | $4 | 1.05M | $2 on OpenAI (flex) | · |
| GPT-6 Sol Pro OpenAI · 1.05MCheapest: $2 on OpenAI (flex) | $2 | $10 | $2 / $10 | $4 | 1.05M | $2 on OpenAI (flex) | · |
 Gemini 3.8 FlashGoogle · 1MCheapest: $0.75 on Google Gemini API (flex) | $0.75 | $3.75 | $0.75 / $3.75 | $1.5 | 1M | $0.75 on Google Gemini API (flex) | · |
 GLM 5.3Z.ai · 1.31M | $0.561 | $1.76 | $0.561 / $1.76 | $0.862 | 1.31M | on Baidu (fp8) | · |
| Gemini 3.7 Flash Google · 1MCheapest: $0.75 on Google Vertex AI (global-flex) | $0.75 | $3.75 | $0.75 / $3.75100% | $1.5 | 1M | $0.75 on Google Vertex AI (global-flex) | 100% |
| GLM 4.6 Z.ai · 205K | $0.43 | $1.75 | $0.43 / $1.75 | $0.76 | 205K | on Venice (fp4) | · |
About GPT-3.5 Turbo
GPT-3.5 Turbo is OpenAI's fastest model. It can understand and generate natural language or code, and is optimized for chat and traditional completion tasks.
Takes text in and returns text. First listed Mar 26, 2024. Up to 4K output tokens. Blended price $0.75 per 1M tokens at 3 input to 1 output. Model id gpt-3-5-turbo.
Price history
List price since Mar 26, 2024, from Internet Archive snapshots of the OpenRouter catalog, then daily reads.
| Seen | Model | Old price | New price | Change |
|---|---|---|---|---|
| Apr 18, 2024 | GPT-3.5 TurboInput $1 to $0.5, Output $2 to $1.5 | Input $1Output $2 | Input $0.5Output $1.5 | -50% |
Questions
How much does GPT-3.5 Turbo cost?
$0.5 per million input tokens and $1.5 per million output tokens, or $0.25 and $0.75 through the Batch API.
What is the context window of GPT-3.5 Turbo?
16K tokens, with up to 4K tokens of output.
Has GPT-3.5 Turbo's price changed?
Yes. The output price went from $2 to $1.5, first seen Apr 18, 2024.
Sources: OpenRouter's public model catalog and each provider's own pricing page, read every morning at 05:00 UTC; gateway fees re-read every Monday. List prices: your contract may differ. Logos via logo.dev; trademarks belong to their owners.