Model Comparison

Gemini 1.5 Flash vs GPT-4 TurboWhich is better in 2026?

GPT-4 Turbo has a slight edge in benchmark performance. Gemini 1.5 Flash is 57.1x cheaper per token.

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

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

Gemini 1.5 Flash outperforms in 2 benchmarks (GPQA, MATH), while GPT-4 Turbo is better at 3 benchmarks (HumanEval, MGSM, MMLU). GPT-4 Turbo has a slight edge in benchmark performance.

On price, Gemini 1.5 Flash is roughly 57.1x 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 Gemini 1.5 Flash if…

  • cost matters — it's about 57.1x 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

Choose GPT-4 Turbo if…

  • you want the strongest raw capability — it leads on 3 of 5 shared benchmarks
Want to compare interactively?Try the playground

Performance Benchmarks

Comparative analysis across standard metrics

5 benchmarks

Gemini 1.5 Flash outperforms in 2 benchmarks (GPQA, MATH), while GPT-4 Turbo is better at 3 benchmarks (HumanEval, MGSM, MMLU).

GPT-4 Turbo has a slight edge in benchmark performance.

Thu Jun 18 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, Gemini 1.5 Flash ($0.15/1M tokens) is 66.7x cheaper than GPT-4 Turbo ($10.00/1M tokens).

For output processing, Gemini 1.5 Flash ($0.60/1M tokens) is 50.0x cheaper than GPT-4 Turbo ($30.00/1M tokens).

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

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

Lowest available price from all providers
Thu Jun 18 2026 • llm-stats.com
Google
Gemini 1.5 Flash
Input tokens$0.15
Output tokens$0.60
Best providerGoogle
OpenAI
GPT-4 Turbo
Input tokens$10.00
Output tokens$30.00
Best providerAzure
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 Turbo's 128,000 tokens. Gemini 1.5 Flash can generate longer responses up to 8,192 tokens, while GPT-4 Turbo is limited to 4,096 tokens.

Google
Gemini 1.5 Flash
Input1,048,576 tokens
Output8,192 tokens
OpenAI
GPT-4 Turbo
Input128,000 tokens
Output4,096 tokens
Thu Jun 18 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Gemini 1.5 Flash supports multimodal inputs, whereas GPT-4 Turbo does not.

Gemini 1.5 Flash can handle both text and other forms of data like images, making it suitable for multimodal applications.

Gemini 1.5 Flash

Text
Images
Audio
Video

GPT-4 Turbo

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 Flash

Proprietary

Closed source

GPT-4 Turbo

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 1.5 Flash was released on 2024-05-01, while GPT-4 Turbo was released on 2024-04-09.

Gemini 1.5 Flash is 1 month newer than GPT-4 Turbo.

Gemini 1.5 Flash

May 1, 2024

2.1 years ago

3w newer
GPT-4 Turbo

Apr 9, 2024

2.2 years ago

Knowledge Cutoff

When training data ends

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

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

Gemini 1.5 Flash

Nov 2023

GPT-4 Turbo

Dec 2023

1 mo newer

Provider Availability

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

Gemini 1.5 Flash

google logo
Google
Input Price:Input: $0.15/1MOutput Price:Output: $0.60/1M

GPT-4 Turbo

azure logo
Azure
Input Price:Input: $10.00/1MOutput Price:Output: $30.00/1M
openai logo
OpenAI
Input Price:Input: $10.00/1MOutput Price:Output: $30.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Google
Larger context window (1,048,576 tokens)
Supports multimodal inputs
Less expensive input tokens
Less expensive output tokens
Higher GPQA score (51.0% vs 48.0%)
Higher MATH score (77.9% vs 72.6%)
OpenAI
Higher HumanEval score (87.1% vs 74.3%)
Higher MGSM score (88.5% vs 82.6%)
Higher MMLU score (86.5% vs 78.9%)
GoogleGemini 1.5 Flash
OpenAIGPT-4 Turbo
Compare in Playground

Detailed Comparison

AI Model Comparison Table
Feature
Google
Gemini 1.5 Flash
OpenAI
GPT-4 Turbo

FAQ

Common questions about Gemini 1.5 Flash vs GPT-4 Turbo.

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

GPT-4 Turbo has a slight edge in benchmark performance. Gemini 1.5 Flash is made by Google and GPT-4 Turbo is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

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

Gemini 1.5 Flash scores XSTest: 97.0%, FLEURS: 90.4%, HellaSwag: 86.5%, GSM8k: 86.2%, BIG-Bench Hard: 85.5%. GPT-4 Turbo scores MGSM: 88.5%, HumanEval: 87.1%, MMLU: 86.5%, DROP: 86.0%, MATH: 72.6%.

Is Gemini 1.5 Flash cheaper than GPT-4 Turbo?

Gemini 1.5 Flash is 66.7x cheaper for input tokens. Gemini 1.5 Flash costs $0.15/M input and $0.60/M output via google. GPT-4 Turbo costs $10.00/M input and $30.00/M output via azure.

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

Gemini 1.5 Flash supports 1.0M tokens and GPT-4 Turbo supports 128K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

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

Key differences include context window (1.0M vs 128K), input pricing ($0.15 vs $10.00/M), multimodal support (yes vs no). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 1.5 Flash and GPT-4 Turbo?

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

Related comparisons