GPT-3.5 Turbo
Legacy
The model that launched the ChatGPT API in 2023. Deprecated, kept for legacy traffic only; GPT-4.1 nano is the modern cheap default.
GPT-3.5 Turbo is a efficient AI model from OpenAI. It costs $0.500 per million input tokens and $1.500 per million output tokens (blended $0.800/M), with a 16,000-token context window.
INPUT
$0.500/M
per million input tokens
OUTPUT
$1.500/M
per million output tokens
CONTEXT
16,000
tokens
What it is good at
- Cheap
- Fast
- Wide tooling support
Typical use cases
- Legacy 3.5-turbo integrations
Benchmarks
vs. best public score
Hand-curated from each provider's published reports and public leaderboards. Methodology varies across sources, treat as directional rather than authoritative.
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in $2.000/Mout $12.000/M
GPT-5.6 Luna
Efficient · 1,050,000 ctx
in $0.200/Mout $1.200/M
GPT-5.5
Frontier · 1,050,000 ctx
in $5.000/Mout $30.000/M
GPT-5.2
Frontier · 400,000 ctx
in $1.750/Mout $14.000/M
GPT-5.2-Codex
Coding · 400,000 ctx
in $1.750/Mout $14.000/M
Frequently asked questions
How much does GPT-3.5 Turbo cost?
GPT-3.5 Turbo costs $0.500 per million input tokens and $1.500 per million output tokens, for a blended reference rate of $0.800 per million tokens.
What is GPT-3.5 Turbo's context window?
GPT-3.5 Turbo supports up to 16,000 tokens of context in a single request.
What is GPT-3.5 Turbo best for?
GPT-3.5 Turbo is well suited to Cheap, Fast and Wide tooling support.
Who makes GPT-3.5 Turbo?
GPT-3.5 Turbo is developed and served by OpenAI. It was released in Mar 2023.