Model Comparison

Gemini 2.0 Flash Thinking vs o1Which is better in 2026?

o1 significantly outperforms across most benchmarks.

Verdict: Gemini 2.0 Flash Thinking vs o1 — which is better?

Gemini 2.0 Flash Thinking (by Google) and o1 (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 2.0 Flash Thinking outperforms in 0 benchmarks, while o1 is better at 3 benchmarks (AIME 2024, GPQA, MMMU). o1 significantly outperforms across most benchmarks.

Choose Gemini 2.0 Flash Thinking if…

  • you want the most recent training data — it shipped Jan 2025

Choose o1 if…

  • you want the strongest raw capability — it leads on 3 of 3 shared benchmarks

Performance Benchmarks

Comparative analysis across standard metrics

3 benchmarks

Gemini 2.0 Flash Thinking outperforms in 0 benchmarks, while o1 is better at 3 benchmarks (AIME 2024, GPQA, MMMU).

o1 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 o1 specifies input context (200,000 tokens). Only o1 specifies output context (100,000 tokens).

Google
Gemini 2.0 Flash Thinking
Input- tokens
Output- tokens
OpenAI
o1
Input200,000 tokens
Output100,000 tokens
Sat Jun 27 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Gemini 2.0 Flash Thinking supports multimodal inputs, whereas o1 does not.

Gemini 2.0 Flash Thinking can handle both text and other forms of data like images, making it suitable for multimodal applications.

Gemini 2.0 Flash Thinking

Text
Images
Audio
Video

o1

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Gemini 2.0 Flash Thinking

Proprietary

Closed source

o1

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 2.0 Flash Thinking was released on 2025-01-21, while o1 was released on 2024-12-17.

Gemini 2.0 Flash Thinking is 1 month newer than o1.

Gemini 2.0 Flash Thinking

Jan 21, 2025

1.4 years ago

1mo newer
o1

Dec 17, 2024

1.5 years ago

Knowledge Cutoff

When training data ends

Gemini 2.0 Flash Thinking has a documented knowledge cutoff of 2024-08-01, while o1's cutoff date is not specified.

We can confirm Gemini 2.0 Flash Thinking's training data extends to 2024-08-01, but cannot make a direct comparison without o1's cutoff date.

Gemini 2.0 Flash Thinking

Aug 2024

o1

—

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Google
Supports multimodal inputs
OpenAI
Larger context window (200,000 tokens)
Higher AIME 2024 score (74.3% vs 73.3%)
Higher GPQA score (78.0% vs 74.2%)
Higher MMMU score (77.6% vs 75.4%)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Gemini 2.0 Flash Thinking and o1 side-by-side, then vote on the output you prefer.

Gemini 2.0 Flash Thinking
✓ Preferred
o1
Open in Playground
AI Model Comparison Table
Feature
Google
Gemini 2.0 Flash Thinking
OpenAI
o1

FAQ

Common questions about Gemini 2.0 Flash Thinking vs o1.

Which is better, Gemini 2.0 Flash Thinking or o1?

o1 significantly outperforms across most benchmarks. Gemini 2.0 Flash Thinking is made by Google and o1 is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Gemini 2.0 Flash Thinking compare to o1 in benchmarks?

Gemini 2.0 Flash Thinking scores MMMU: 75.4%, GPQA: 74.2%, AIME 2024: 73.3%. o1 scores GSM8k: 97.1%, MATH: 96.4%, GPQA Physics: 92.8%, MMLU: 91.8%, MGSM: 89.3%.

What are the context window sizes for Gemini 2.0 Flash Thinking and o1?

Gemini 2.0 Flash Thinking supports an unknown number of tokens and o1 supports 200K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Gemini 2.0 Flash Thinking and o1?

Key differences include multimodal support (yes vs no). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 2.0 Flash Thinking and o1?

Gemini 2.0 Flash Thinking is developed by Google and o1 is developed by OpenAI.

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