GPT-3.5 Turbo vs o1

Comparing GPT-3.5 Turbo by OpenAI and o1 by OpenAI across benchmarks, pricing, and capabilities.

o1 significantly outperforms across most benchmarks. GPT-3.5 Turbo is 35.0x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

7 benchmarks

GPT-3.5 Turbo outperforms in 0 benchmarks, while o1 is better at 7 benchmarks (GPQA, HumanEval, MATH, MathVista, MGSM, MMLU, MMMU).

o1 significantly outperforms across most benchmarks.

Tue Mar 24 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

GPT-3.5 Turbo costs less

For input processing, GPT-3.5 Turbo ($0.50/1M tokens) is 30.0x cheaper than o1 ($15.00/1M tokens).

For output processing, GPT-3.5 Turbo ($1.50/1M tokens) is 40.0x cheaper than o1 ($60.00/1M tokens).

In conclusion, o1 is more expensive than GPT-3.5 Turbo.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers

Tue Mar 24 2026 • llm-stats.com

GPT-3.5 Turbo

Input tokens$0.50

Output tokens$1.50

Best providerAzure

Input tokens$15.00

Output tokens$60.00

Best providerAzure

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Context Window

Maximum input and output token capacity

o1 accepts 200,000 input tokens compared to GPT-3.5 Turbo's 16,385 tokens. o1 can generate longer responses up to 100,000 tokens, while GPT-3.5 Turbo is limited to 4,096 tokens.

GPT-3.5 Turbo

Input16,385 tokens

Output4,096 tokens

Input200,000 tokens

Output100,000 tokens

Tue Mar 24 2026 • llm-stats.com

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

GPT-3.5 Turbo

Proprietary

Closed source

Proprietary

Closed source

Release Timeline

When each model was launched

GPT-3.5 Turbo was released on 2023-03-21, while o1 was released on 2024-12-17.

o1 is 21 months newer than GPT-3.5 Turbo.

GPT-3.5 Turbo

Mar 21, 2023

3.0 years ago

Dec 17, 2024

1.3 years ago

1.7yr newer

Knowledge Cutoff

When training data ends

GPT-3.5 Turbo has a documented knowledge cutoff of 2021-09-30, while o1's cutoff date is not specified.

We can confirm GPT-3.5 Turbo's training data extends to 2021-09-30, but cannot make a direct comparison without o1's cutoff date.

GPT-3.5 Turbo

Sep 2021

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Provider Availability

GPT-3.5 Turbo is available from Azure, OpenAI. o1 is available from Azure, OpenAI. The availability of providers can affect quality of the model and reliability.