Model Comparison

GPT-5.2 vs Gemini 2.5 Flash

GPT-5.2 significantly outperforms across most benchmarks. Gemini 2.5 Flash is 5.7x cheaper per token.

Want to compare interactively?Try the playground

Performance Benchmarks

Comparative analysis across standard metrics

4 benchmarks

GPT-5.2 outperforms in 4 benchmarks (AIME 2025, GPQA, Humanity's Last Exam, SWE-Bench Verified), while Gemini 2.5 Flash is better at 0 benchmarks.

GPT-5.2 significantly outperforms across most benchmarks.

Tue Apr 21 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Gemini 2.5 Flash costs less

For input processing, GPT-5.2 ($1.75/1M tokens) is 5.8x more expensive than Gemini 2.5 Flash ($0.30/1M tokens).

For output processing, GPT-5.2 ($14.00/1M tokens) is 5.6x more expensive than Gemini 2.5 Flash ($2.50/1M tokens).

In conclusion, GPT-5.2 is more expensive than Gemini 2.5 Flash.*

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

Lowest available price from all providers
Tue Apr 21 2026 • llm-stats.com
OpenAI
GPT-5.2
Input tokens$1.75
Output tokens$14.00
Best providerOpenAI
Google
Gemini 2.5 Flash
Input tokens$0.30
Output tokens$2.50
Best providerGoogle
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Gemini 2.5 Flash accepts 1,048,576 input tokens compared to GPT-5.2's 400,000 tokens. GPT-5.2 can generate longer responses up to 128,000 tokens, while Gemini 2.5 Flash is limited to 65,536 tokens.

OpenAI
GPT-5.2
Input400,000 tokens
Output128,000 tokens
Google
Gemini 2.5 Flash
Input1,048,576 tokens
Output65,536 tokens
Tue Apr 21 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both GPT-5.2 and Gemini 2.5 Flash support multimodal inputs.

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

GPT-5.2

Text
Images
Audio
Video

Gemini 2.5 Flash

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.

GPT-5.2

Proprietary

Closed source

Gemini 2.5 Flash

Proprietary

Closed source

Release Timeline

When each model was launched

GPT-5.2 was released on 2025-12-11, while Gemini 2.5 Flash was released on 2025-05-20.

GPT-5.2 is 7 months newer than Gemini 2.5 Flash.

GPT-5.2

Dec 11, 2025

4 months ago

6mo newer
Gemini 2.5 Flash

May 20, 2025

11 months ago

Knowledge Cutoff

When training data ends

GPT-5.2 has a knowledge cutoff of 2025-08-25, while Gemini 2.5 Flash has a cutoff of 2025-01-31.

GPT-5.2 has more recent training data (up to 2025-08-25), making it potentially better informed about events through that date compared to Gemini 2.5 Flash (2025-01-31).

GPT-5.2

Aug 2025

7 mo newer
Gemini 2.5 Flash

Jan 2025

Provider Availability

GPT-5.2 is available from OpenAI. Gemini 2.5 Flash is available from Google.

GPT-5.2

openai logo
OpenAI
Input Price:Input: $1.75/1MOutput Price:Output: $14.00/1M

Gemini 2.5 Flash

google logo
Google
Input Price:Input: $0.30/1MOutput Price:Output: $2.50/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

OpenAI
Higher AIME 2025 score (100.0% vs 72.0%)
Higher GPQA score (92.4% vs 82.8%)
Higher Humanity's Last Exam score (34.5% vs 11.0%)
Higher SWE-Bench Verified score (80.0% vs 60.4%)
Google
Larger context window (1,048,576 tokens)
Less expensive input tokens
Less expensive output tokens
OpenAIGPT-5.2
GoogleGemini 2.5 Flash
Compare in Playground

Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
GPT-5.2
Google
Gemini 2.5 Flash

FAQ

Common questions about GPT-5.2 vs Gemini 2.5 Flash

GPT-5.2 significantly outperforms across most benchmarks. GPT-5.2 is made by OpenAI and Gemini 2.5 Flash is made by Google. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.
GPT-5.2 scores AIME 2025: 100.0%, HMMT 2025: 99.4%, Tau2 Telecom: 98.7%, Graphwalks BFS <128k: 94.0%, GPQA: 92.4%. Gemini 2.5 Flash scores Global-MMLU-Lite: 88.4%, AIME 2024: 88.0%, FACTS Grounding: 85.3%, GPQA: 82.8%, MMMU: 79.7%.
Gemini 2.5 Flash is 5.8x cheaper for input tokens. GPT-5.2 costs $1.75/M input and $14.00/M output via openai. Gemini 2.5 Flash costs $0.30/M input and $2.50/M output via google.
GPT-5.2 supports 400K tokens and Gemini 2.5 Flash 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 (400K vs 1.0M), input pricing ($1.75 vs $0.30/M). See the full comparison above for benchmark-by-benchmark results.
GPT-5.2 is developed by OpenAI and Gemini 2.5 Flash is developed by Google.