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Gemini 1.5 Flash vs GPT-4o mini

Gemini 1.5 Flash and GPT-4o mini are closely matched at 6.6 and 4.2 on the LLM Stats Score. Gemini 1.5 Flash and GPT-4o mini cost the same.

Google · OpenAI · Updated for 2026

Which is better?

Gemini 1.5 Flash and GPT-4o mini are closely matched on the overall LLM Stats Score at 6.6 and 4.2.

In the 7 individual benchmarks reported for both models, Gemini 1.5 Flash wins 4; this is a narrower head-to-head signal than the composite indexes.

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.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Gemini 1.5 Flash

  • you value its reported benchmark strengths — it wins 4 of 7 exact shared results
  • you process long inputs — it offers a 1,048,576 token context window

Choose GPT-4o mini

  • you want the most recent training data — it shipped Jul 2024

At a glance

The differences that matter most.

Gemini 1.5 Flash
Google
GPT-4o mini
OpenAI
Core performance indexes
LLM Stats Score
6.6
#272
4.2
#285
Reasoning
6.2
#270
4.7
#276
Coding
-0.3
#227
-0.2
#226
Cost, coverage & limits
Benchmark wins
4 of 7
3 of 7
Input price
$0.15 / M
$0.15 / M
Output price
$0.60 / M
$0.60 / M
Context window
1,048,576
128,000

Capability indexes

Additional strengths measured across groups of related public benchmarks

3 shared
Index
Gemini 1.5 Flash
GPT-4o mini
Math
11.0#233
11.8#228
Vision
6.0#143
0.1#174
Multimodal
9.5#112
2.9#136
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

22 reported for Gemini 1.5 Flash · 9 for GPT-4o mini

7 shared

Gemini 1.5 Flash outperforms in 4 benchmarks (GPQA, MATH, MathVista, MMMU), while GPT-4o mini is better at 3 benchmarks (HumanEval, MGSM, MMLU).

Gemini 1.5 Flash has a slight edge in benchmark performance.

Sun Aug 30 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

For input processing, Gemini 1.5 Flash ($0.15/1M tokens) costs the same as GPT-4o mini ($0.15/1M tokens).

For output processing, Gemini 1.5 Flash ($0.60/1M tokens) costs the same as GPT-4o mini ($0.60/1M tokens).

In conclusion, Gemini 1.5 Flash and GPT-4o mini cost the same.*

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

Lowest available price from all providers
Sun Aug 30 2026 • llm-stats.com
Google
Gemini 1.5 Flash
Input tokens$0.15
Output tokens$0.60
Best providerGoogle
OpenAI
GPT-4o mini
Input tokens$0.15
Output tokens$0.60
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-4o mini's 128,000 tokens. GPT-4o mini can generate longer responses up to 16,384 tokens, while Gemini 1.5 Flash is limited to 8,192 tokens.

Google
Gemini 1.5 Flash
Input1,048,576 tokens
Output8,192 tokens
OpenAI
GPT-4o mini
Input128,000 tokens
Output16,384 tokens
Sun Aug 30 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

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

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

Gemini 1.5 Flash

Text
Images
Audio
Video

GPT-4o mini

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-4o mini

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 1.5 Flash was released on 2024-05-01, while GPT-4o mini was released on 2024-07-18.

GPT-4o mini is 3 months newer than Gemini 1.5 Flash.

Gemini 1.5 Flash

May 1, 2024

2.3 years ago

GPT-4o mini

Jul 18, 2024

2.1 years ago

2mo newer

Knowledge Cutoff

When training data ends

Gemini 1.5 Flash has a knowledge cutoff of 2023-11-01, while GPT-4o mini has a cutoff of 2023-10-01.

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-4o mini (2023-10-01).

Gemini 1.5 Flash

Nov 2023

1 mo newer
GPT-4o mini

Oct 2023

Provider Availability

Gemini 1.5 Flash is available from Google. GPT-4o mini is available from Azure.

Gemini 1.5 Flash

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

GPT-4o mini

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

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

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

Gemini 1.5 Flash
✓ Preferred
GPT-4o mini
Open in Playground

FAQ

Common questions about Gemini 1.5 Flash vs GPT-4o mini.

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

Gemini 1.5 Flash and GPT-4o mini are closely matched on the LLM Stats Score at 6.6 and 4.2. Gemini 1.5 Flash is made by Google and GPT-4o mini is made by OpenAI. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Gemini 1.5 Flash compare to GPT-4o mini 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-4o mini scores HumanEval: 87.2%, MGSM: 87.0%, MMLU: 82.0%, DROP: 79.7%, MATH: 70.2%.

Is Gemini 1.5 Flash cheaper than GPT-4o mini?

Both models cost $0.15 per million input tokens.

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

Gemini 1.5 Flash supports 1.0M tokens and GPT-4o mini 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-4o mini?

Key differences include LLM Stats Score (6.6 vs 4.2), context window (1.0M vs 128K). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 1.5 Flash and GPT-4o mini?

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

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