Model Comparison

Gemini 1.5 Pro vs GPT-5

GPT-5 significantly outperforms across most benchmarks. GPT-5 is 1.3x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

5 benchmarks

Gemini 1.5 Pro outperforms in 1 benchmarks (MATH), while GPT-5 is better at 4 benchmarks (GPQA, HumanEval, MMLU, MMMU).

GPT-5 significantly outperforms across most benchmarks.

Thu Apr 30 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

GPT-5 costs less

For input processing, Gemini 1.5 Pro ($2.50/1M tokens) is 2.0x more expensive than GPT-5 ($1.25/1M tokens).

For output processing, Gemini 1.5 Pro ($10.00/1M tokens) costs the same as GPT-5 ($10.00/1M tokens).

In conclusion, Gemini 1.5 Pro is more expensive than GPT-5.*

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

Lowest available price from all providers
Thu Apr 30 2026 • llm-stats.com
Google
Gemini 1.5 Pro
Input tokens$2.50
Output tokens$10.00
Best providerGoogle
OpenAI
GPT-5
Input tokens$1.25
Output tokens$10.00
Best providerOpenAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Gemini 1.5 Pro accepts 2,097,152 input tokens compared to GPT-5's 400,000 tokens. GPT-5 can generate longer responses up to 128,000 tokens, while Gemini 1.5 Pro is limited to 8,192 tokens.

Google
Gemini 1.5 Pro
Input2,097,152 tokens
Output8,192 tokens
OpenAI
GPT-5
Input400,000 tokens
Output128,000 tokens
Thu Apr 30 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Gemini 1.5 Pro and GPT-5 support multimodal inputs.

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

Gemini 1.5 Pro

Text
Images
Audio
Video

GPT-5

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 1.5 Pro

Proprietary

Closed source

GPT-5

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 1.5 Pro was released on 2024-05-01, while GPT-5 was released on 2025-08-07.

GPT-5 is 15 months newer than Gemini 1.5 Pro.

Gemini 1.5 Pro

May 1, 2024

2.0 years ago

GPT-5

Aug 7, 2025

8 months ago

1.3yr newer

Knowledge Cutoff

When training data ends

Gemini 1.5 Pro has a knowledge cutoff of 2023-11-01, while GPT-5 has a cutoff of 2024-09-30.

GPT-5 has more recent training data (up to 2024-09-30), making it potentially better informed about events through that date compared to Gemini 1.5 Pro (2023-11-01).

Gemini 1.5 Pro

Nov 2023

GPT-5

Sep 2024

10 mo newer

Provider Availability

Gemini 1.5 Pro is available from Google. GPT-5 is available from OpenAI.

Gemini 1.5 Pro

google logo
Google
Input Price:Input: $2.50/1MOutput Price:Output: $10.00/1M

GPT-5

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

Outputs Comparison

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Key Takeaways

Google
Larger context window (2,097,152 tokens)
Higher MATH score (86.5% vs 84.7%)
OpenAI
Less expensive input tokens
Higher GPQA score (85.7% vs 59.1%)
Higher HumanEval score (93.4% vs 84.1%)
Higher MMLU score (92.5% vs 85.9%)
Higher MMMU score (84.2% vs 65.9%)

Detailed Comparison

AI Model Comparison Table
Feature
Google
Gemini 1.5 Pro
OpenAI
GPT-5

FAQ

Common questions about Gemini 1.5 Pro vs GPT-5

GPT-5 significantly outperforms across most benchmarks. Gemini 1.5 Pro is made by Google and GPT-5 is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.
Gemini 1.5 Pro scores XSTest: 98.8%, HellaSwag: 93.3%, GSM8k: 90.8%, BIG-Bench Hard: 89.2%, MGSM: 87.5%. GPT-5 scores SWE-Lancer (IC-Diamond subset): 100.0%, COLLIE: 99.0%, Tau2 Telecom: 96.7%, OpenAI-MRCR: 2 needle 128k: 95.2%, AIME 2025: 94.6%.
GPT-5 is 2.0x cheaper for input tokens. Gemini 1.5 Pro costs $2.50/M input and $10.00/M output via google. GPT-5 costs $1.25/M input and $10.00/M output via openai.
Gemini 1.5 Pro supports 2.1M tokens and GPT-5 supports 400K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.
Key differences include context window (2.1M vs 400K), input pricing ($2.50 vs $1.25/M). See the full comparison above for benchmark-by-benchmark results.
Gemini 1.5 Pro is developed by Google and GPT-5 is developed by OpenAI.