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Gemini 4 Carbon vs o3

Gemini 4 Carbon leads the LLM Stats Score 59.0 to 30.4.

Google · OpenAI · Updated for 2026

Which is better?

Gemini 4 Carbon leads the overall LLM Stats Score 59.0 to 30.4, ranking #2 overall.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Gemini 4 Carbon

  • overall performance matters — it scores 59.0 and ranks #2 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • you want the most recent training data — it shipped Oct 2026

Choose o3

  • you want predictable pricing at $2.00/M input and $8.00/M output

At a glance

The differences that matter most.

Gemini 4 Carbon
Google
o3
OpenAI
Core performance indexes
LLM Stats Score
59.0
#2
30.4
#143
Reasoning
54.9
#5
30.1
#145
Coding
48.1
#3
14.9
#158
Agents
46.0
#2
3.0
#194
Cost, coverage & limits
Benchmark wins
—
—
Input price
— / M
$2.00 / M
Output price
— / M
$8.00 / M
Context window
—
200,000

Capability indexes

Additional strengths measured across groups of related public benchmarks

3 shared
Index
Gemini 4 Carbon
o3
Vision
36.0#12
21.5#80
Tool use
35.8#3
10.2#150
Multimodal
38.0#6
25.0#62
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

16 reported for Gemini 4 Carbon · 22 for o3

No common benchmarks found

Gemini 4 Carbon and o3don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Only o3 specifies input context (200,000 tokens). Only o3 specifies output context (100,000 tokens).

Google
Gemini 4 Carbon
Input- tokens
Output- tokens
OpenAI
o3
Input200,000 tokens
Output100,000 tokens
Sat Oct 31 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Gemini 4 Carbon and o3 support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Gemini 4 Carbon

Text
Images
Audio
Video

o3

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 4 Carbon

Proprietary

Closed source

o3

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 4 Carbon was released on 2026-10-28, while o3 was released on 2025-04-16.

Gemini 4 Carbon is 19 months newer than o3.

Gemini 4 Carbon

Oct 28, 2026

2 days ago

1.5yr newer
o3

Apr 16, 2025

1.5 years ago

Knowledge Cutoff

When training data ends

o3 has a documented knowledge cutoff of 2024-05-31, while Gemini 4 Carbon's cutoff date is not specified.

We can confirm o3's training data extends to 2024-05-31, but cannot make a direct comparison without Gemini 4 Carbon's cutoff date.

Gemini 4 Carbon

—

o3

May 2024

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Gemini 4 Carbon and o3 side-by-side, then vote on the output you prefer.

Gemini 4 Carbon
✓ Preferred
o3
Open in Playground

FAQ

Common questions about Gemini 4 Carbon vs o3.

Which is better, Gemini 4 Carbon or o3?

Gemini 4 Carbon leads the LLM Stats Score 59.0 to 30.4. Gemini 4 Carbon is made by Google and o3 is made by OpenAI. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Gemini 4 Carbon compare to o3 in benchmarks?

Gemini 4 Carbon scores Gray Swan IPI Benchmark: 100.0%, Vending-Bench 2: 100.0%, Graphwalks BFS >128k: 96.2%, WebDev Arena: 88.4%, SEC-bench Pro: 88.2%. o3 scores COLLIE: 98.4%, AIME 2024: 91.6%, ARC-AGI: 88.0%, MathVista: 86.8%, AIME 2025: 86.4%.

What are the context window sizes for Gemini 4 Carbon and o3?

Gemini 4 Carbon supports an unknown number of tokens and o3 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 4 Carbon and o3?

Key differences include LLM Stats Score (59.0 vs 30.4). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 4 Carbon and o3?

Gemini 4 Carbon is developed by Google and o3 is developed by OpenAI.

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