Model Comparison

GPT-4 vs Gemini 1.5 FlashWhich is better in 2026?

Gemini 1.5 Flash shows notably better performance in the majority of benchmarks. Gemini 1.5 Flash is 142.9x cheaper per token.

Verdict: GPT-4 vs Gemini 1.5 Flash — which is better?

GPT-4 (by OpenAI) and Gemini 1.5 Flash (by Google) 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.

GPT-4 outperforms in 2 benchmarks (HellaSwag, MMLU), while Gemini 1.5 Flash is better at 4 benchmarks (GPQA, HumanEval, MATH, MGSM). Gemini 1.5 Flash shows notably better performance in the majority of benchmarks.

On price, Gemini 1.5 Flash is roughly 142.9x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Gemini 1.5 Flash also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.

Choose GPT-4 if…

  • you want predictable pricing at $30.00/M input and $60.00/M output

Choose Gemini 1.5 Flash if…

  • you want the strongest raw capability — it leads on 4 of 6 shared benchmarks
  • cost matters — it's about 142.9x cheaper per token
  • you process long inputs — it offers a 1,048,576 token context window
  • you want the most recent training data — it shipped May 2024

Performance Benchmarks

Comparative analysis across standard metrics

6 benchmarks

GPT-4 outperforms in 2 benchmarks (HellaSwag, MMLU), while Gemini 1.5 Flash is better at 4 benchmarks (GPQA, HumanEval, MATH, MGSM).

Gemini 1.5 Flash shows notably better performance in the majority of benchmarks.

Wed Jul 01 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Gemini 1.5 Flash costs less

For input processing, GPT-4 ($30.00/1M tokens) is 200.0x more expensive than Gemini 1.5 Flash ($0.15/1M tokens).

For output processing, GPT-4 ($60.00/1M tokens) is 100.0x more expensive than Gemini 1.5 Flash ($0.60/1M tokens).

In conclusion, GPT-4 is more expensive than Gemini 1.5 Flash.*

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

Lowest available price from all providers
Wed Jul 01 2026 • llm-stats.com
OpenAI
GPT-4
Input tokens$30.00
Output tokens$60.00
Best providerAzure
Google
Gemini 1.5 Flash
Input tokens$0.15
Output tokens$0.60
Best providerGoogle
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Gemini 1.5 Flash accepts 1,048,576 input tokens compared to GPT-4's 32,768 tokens. GPT-4 can generate longer responses up to 32,768 tokens, while Gemini 1.5 Flash is limited to 8,192 tokens.

OpenAI
GPT-4
Input32,768 tokens
Output32,768 tokens
Google
Gemini 1.5 Flash
Input1,048,576 tokens
Output8,192 tokens
Wed Jul 01 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both GPT-4 and Gemini 1.5 Flash support multimodal inputs.

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

GPT-4

Text
Images
Audio
Video

Gemini 1.5 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-4

Proprietary

Closed source

Gemini 1.5 Flash

Proprietary

Closed source

Release Timeline

When each model was launched

GPT-4 was released on 2023-06-13, while Gemini 1.5 Flash was released on 2024-05-01.

Gemini 1.5 Flash is 11 months newer than GPT-4.

GPT-4

Jun 13, 2023

3.1 years ago

Gemini 1.5 Flash

May 1, 2024

2.2 years ago

10mo newer

Knowledge Cutoff

When training data ends

GPT-4 has a knowledge cutoff of 2022-12-31, while Gemini 1.5 Flash has a cutoff of 2023-11-01.

Gemini 1.5 Flash has more recent training data (up to 2023-11-01), making it potentially better informed about events through that date compared to GPT-4 (2022-12-31).

GPT-4

Dec 2022

Gemini 1.5 Flash

Nov 2023

11 mo newer

Provider Availability

GPT-4 is available from Azure, OpenAI. Gemini 1.5 Flash is available from Google.

GPT-4

azure logo
Azure
Input Price:Input: $30.00/1MOutput Price:Output: $60.00/1M
openai logo
OpenAI
Input Price:Input: $30.00/1MOutput Price:Output: $60.00/1M

Gemini 1.5 Flash

google logo
Google
Input Price:Input: $0.15/1MOutput Price:Output: $0.60/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

OpenAI
Higher HellaSwag score (95.3% vs 86.5%)
Higher MMLU score (86.4% vs 78.9%)
Google
Larger context window (1,048,576 tokens)
Less expensive input tokens
Less expensive output tokens
Higher GPQA score (51.0% vs 35.7%)
Higher HumanEval score (74.3% vs 67.0%)
Higher MATH score (77.9% vs 42.0%)
Higher MGSM score (82.6% vs 74.5%)
OpenAIGPT-4
GoogleGemini 1.5 Flash
Compare in Playground

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against GPT-4 and Gemini 1.5 Flash side-by-side, then vote on the output you prefer.

GPT-4
✓ Preferred
Gemini 1.5 Flash
Open in Playground
AI Model Comparison Table
Feature
OpenAI
GPT-4
Google
Gemini 1.5 Flash

FAQ

Common questions about GPT-4 vs Gemini 1.5 Flash.

Which is better, GPT-4 or Gemini 1.5 Flash?

Gemini 1.5 Flash shows notably better performance in the majority of benchmarks. GPT-4 is made by OpenAI and Gemini 1.5 Flash is made by Google. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does GPT-4 compare to Gemini 1.5 Flash in benchmarks?

GPT-4 scores AI2 Reasoning Challenge (ARC): 96.3%, HellaSwag: 95.3%, Uniform Bar Exam: 90.0%, SAT Math: 89.0%, LSAT: 88.0%. Gemini 1.5 Flash scores XSTest: 97.0%, FLEURS: 90.4%, HellaSwag: 86.5%, GSM8k: 86.2%, BIG-Bench Hard: 85.5%.

Is GPT-4 cheaper than Gemini 1.5 Flash?

Gemini 1.5 Flash is 200.0x cheaper for input tokens. GPT-4 costs $30.00/M input and $60.00/M output via azure. Gemini 1.5 Flash costs $0.15/M input and $0.60/M output via google.

What are the context window sizes for GPT-4 and Gemini 1.5 Flash?

GPT-4 supports 33K tokens and Gemini 1.5 Flash supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between GPT-4 and Gemini 1.5 Flash?

Key differences include context window (33K vs 1.0M), input pricing ($30.00 vs $0.15/M). See the full comparison above for benchmark-by-benchmark results.

Who makes GPT-4 and Gemini 1.5 Flash?

GPT-4 is developed by OpenAI and Gemini 1.5 Flash is developed by Google.

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