Model Comparison

Gemini Diffusion vs GPT-3.5 TurboWhich is better in 2026?

Gemini Diffusion significantly outperforms across most benchmarks.

Verdict: Gemini Diffusion vs GPT-3.5 Turbo — which is better?

Gemini Diffusion (by Google) and GPT-3.5 Turbo (by OpenAI) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

Gemini Diffusion outperforms in 2 benchmarks (GPQA, HumanEval), while GPT-3.5 Turbo is better at 0 benchmarks. Gemini Diffusion significantly outperforms across most benchmarks.

Choose Gemini Diffusion if…

  • you want the strongest raw capability — it leads on 2 of 2 shared benchmarks
  • you want the most recent training data — it shipped May 2025

Choose GPT-3.5 Turbo if…

  • you want predictable pricing at $0.50/M input and $1.50/M output

Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

Gemini Diffusion outperforms in 2 benchmarks (GPQA, HumanEval), while GPT-3.5 Turbo is better at 0 benchmarks.

Gemini Diffusion significantly outperforms across most benchmarks.

Sat Jun 27 2026 • llm-stats.com

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only GPT-3.5 Turbo specifies input context (16,385 tokens). Only GPT-3.5 Turbo specifies output context (4,096 tokens).

Google
Gemini Diffusion
Input- tokens
Output- tokens
OpenAI
GPT-3.5 Turbo
Input16,385 tokens
Output4,096 tokens
Sat Jun 27 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.

Gemini Diffusion

Proprietary

Closed source

GPT-3.5 Turbo

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini Diffusion was released on 2025-05-20, while GPT-3.5 Turbo was released on 2023-03-21.

Gemini Diffusion is 26 months newer than GPT-3.5 Turbo.

Gemini Diffusion

May 20, 2025

1.1 years ago

2.2yr newer
GPT-3.5 Turbo

Mar 21, 2023

3.3 years ago

Knowledge Cutoff

When training data ends

GPT-3.5 Turbo has a documented knowledge cutoff of 2021-09-30, while Gemini Diffusion'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 Gemini Diffusion's cutoff date.

Gemini Diffusion

—

GPT-3.5 Turbo

Sep 2021

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Google
Higher GPQA score (40.4% vs 30.8%)
Higher HumanEval score (89.6% vs 68.0%)
OpenAI
Larger context window (16,385 tokens)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Gemini Diffusion and GPT-3.5 Turbo side-by-side, then vote on the output you prefer.

Gemini Diffusion
✓ Preferred
GPT-3.5 Turbo
Open in Playground
AI Model Comparison Table
Feature
Google
Gemini Diffusion
OpenAI
GPT-3.5 Turbo

FAQ

Common questions about Gemini Diffusion vs GPT-3.5 Turbo.

Which is better, Gemini Diffusion or GPT-3.5 Turbo?

Gemini Diffusion significantly outperforms across most benchmarks. Gemini Diffusion is made by Google and GPT-3.5 Turbo is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Gemini Diffusion compare to GPT-3.5 Turbo in benchmarks?

Gemini Diffusion scores HumanEval: 89.6%, MBPP: 76.0%, Global-MMLU-Lite: 69.1%, LBPP (v2): 56.8%, BigCodeBench: 45.4%. GPT-3.5 Turbo scores DROP: 70.2%, MMLU: 69.8%, HumanEval: 68.0%, MGSM: 56.3%, MATH: 43.1%.

What are the context window sizes for Gemini Diffusion and GPT-3.5 Turbo?

Gemini Diffusion supports an unknown number of tokens and GPT-3.5 Turbo supports 16K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

Who makes Gemini Diffusion and GPT-3.5 Turbo?

Gemini Diffusion is developed by Google and GPT-3.5 Turbo is developed by OpenAI.

Related comparisons