Model Comparison

ChatGPT-4o Latest vs Gemini 2.5 Pro

ChatGPT-4o Latest significantly outperforms across most benchmarks. Gemini 2.5 Pro is 1.3x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

ChatGPT-4o Latest outperforms in 1 benchmarks (GPQA), while Gemini 2.5 Pro is better at 0 benchmarks.

ChatGPT-4o Latest significantly outperforms across most benchmarks.

Sat Apr 18 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Gemini 2.5 Pro costs less

For input processing, ChatGPT-4o Latest ($2.50/1M tokens) is 2.0x more expensive than Gemini 2.5 Pro ($1.25/1M tokens).

For output processing, ChatGPT-4o Latest ($10.00/1M tokens) costs the same as Gemini 2.5 Pro ($10.00/1M tokens).

In conclusion, ChatGPT-4o Latest is more expensive than Gemini 2.5 Pro.*

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

Lowest available price from all providers
Sat Apr 18 2026 • llm-stats.com
OpenAI
ChatGPT-4o Latest
Input tokens$2.50
Output tokens$10.00
Best providerOpenAI
Google
Gemini 2.5 Pro
Input tokens$1.25
Output tokens$10.00
Best providerGoogle
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Gemini 2.5 Pro accepts 1,048,576 input tokens compared to ChatGPT-4o Latest's 128,000 tokens. Gemini 2.5 Pro can generate longer responses up to 65,536 tokens, while ChatGPT-4o Latest is limited to 16,384 tokens.

OpenAI
ChatGPT-4o Latest
Input128,000 tokens
Output16,384 tokens
Google
Gemini 2.5 Pro
Input1,048,576 tokens
Output65,536 tokens
Sat Apr 18 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both ChatGPT-4o Latest and Gemini 2.5 Pro support multimodal inputs.

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

ChatGPT-4o Latest

Text
Images
Audio
Video

Gemini 2.5 Pro

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.

ChatGPT-4o Latest

Proprietary

Closed source

Gemini 2.5 Pro

Proprietary

Closed source

Release Timeline

When each model was launched

ChatGPT-4o Latest was released on 2024-05-13, while Gemini 2.5 Pro was released on 2025-05-20.

Gemini 2.5 Pro is 12 months newer than ChatGPT-4o Latest.

ChatGPT-4o Latest

May 13, 2024

1.9 years ago

Gemini 2.5 Pro

May 20, 2025

11 months ago

1.0yr newer

Knowledge Cutoff

When training data ends

Gemini 2.5 Pro has a documented knowledge cutoff of 2025-01-31, while ChatGPT-4o Latest's cutoff date is not specified.

We can confirm Gemini 2.5 Pro's training data extends to 2025-01-31, but cannot make a direct comparison without ChatGPT-4o Latest's cutoff date.

ChatGPT-4o Latest

—

Gemini 2.5 Pro

Jan 2025

Provider Availability

ChatGPT-4o Latest is available from OpenAI. Gemini 2.5 Pro is available from Google.

ChatGPT-4o Latest

openai logo
OpenAI
Input Price:Input: $2.50/1MOutput Price:Output: $10.00/1M

Gemini 2.5 Pro

google logo
Google
Input Price:Input: $1.25/1MOutput Price:Output: $10.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

OpenAI
Higher GPQA score (84.0% vs 83.0%)
Google
Larger context window (1,048,576 tokens)
Less expensive input tokens
OpenAIChatGPT-4o Latest
GoogleGemini 2.5 Pro
Compare in Playground

Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
ChatGPT-4o Latest
Google
Gemini 2.5 Pro

FAQ

Common questions about ChatGPT-4o Latest vs Gemini 2.5 Pro

ChatGPT-4o Latest significantly outperforms across most benchmarks. ChatGPT-4o Latest is made by OpenAI and Gemini 2.5 Pro is made by Google. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.
ChatGPT-4o Latest scores GPQA: 84.0%. Gemini 2.5 Pro scores MRCR: 93.0%, AIME 2024: 92.0%, Global-MMLU-Lite: 88.6%, Video-MME: 84.8%, AIME 2025: 83.0%.
Gemini 2.5 Pro is 2.0x cheaper for input tokens. ChatGPT-4o Latest costs $2.50/M input and $10.00/M output via openai. Gemini 2.5 Pro costs $1.25/M input and $10.00/M output via google.
ChatGPT-4o Latest supports 128K tokens and Gemini 2.5 Pro supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.
Key differences include context window (128K vs 1.0M), input pricing ($2.50 vs $1.25/M). See the full comparison above for benchmark-by-benchmark results.
ChatGPT-4o Latest is developed by OpenAI and Gemini 2.5 Pro is developed by Google.