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Gemini 1.5 Flash 8B vs GPT-5 mini

GPT-5 mini significantly outperforms across most benchmarks. Gemini 1.5 Flash 8B is 5.4x cheaper per token.

Google · OpenAI · Updated for 2026

Which is better?

Gemini 1.5 Flash 8B outperforms in 0 benchmarks, while GPT-5 mini is better at 1 benchmark (GPQA). GPT-5 mini significantly outperforms across most benchmarks.

On price, Gemini 1.5 Flash 8B is roughly 5.4x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Gemini 1.5 Flash 8B 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 benchmark, pricing, and model metadata for 2026.

Choose Gemini 1.5 Flash 8B

  • cost matters — it's about 5.4x cheaper per token
  • you process long inputs — it offers a 1,048,576 token context window

Choose GPT-5 mini

  • you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
  • you want the most recent training data — it shipped Aug 2025

At a glance

The differences that matter most.

Gemini 1.5 Flash 8B
Google
GPT-5 mini
OpenAI
Benchmark wins
0 of 1
1 of 1
Input price
$0.07 / M
$0.25 / M
Output price
$0.30 / M
$2.00 / M
Context window
1,048,576
400,000
Released
Mar 2024
Aug 2025
License
Proprietary
Proprietary

Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Gemini 1.5 Flash 8B outperforms in 0 benchmarks, while GPT-5 mini is better at 1 benchmark (GPQA).

GPT-5 mini significantly outperforms across most benchmarks.

Tue Aug 25 2026 • llm-stats.com

Arena Performance

Playground indexes and blind preference scores

Pricing Analysis

Price comparison per million tokens

Gemini 1.5 Flash 8B costs less

For input processing, Gemini 1.5 Flash 8B ($0.07/1M tokens) is 3.6x cheaper than GPT-5 mini ($0.25/1M tokens).

For output processing, Gemini 1.5 Flash 8B ($0.30/1M tokens) is 6.7x cheaper than GPT-5 mini ($2.00/1M tokens).

In conclusion, GPT-5 mini is more expensive than Gemini 1.5 Flash 8B.*

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

Lowest available price from all providers
Tue Aug 25 2026 • llm-stats.com
Google
Gemini 1.5 Flash 8B
Input tokens$0.07
Output tokens$0.30
Best providerGoogle
OpenAI
GPT-5 mini
Input tokens$0.25
Output tokens$2.00
Best providerOpenAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Gemini 1.5 Flash 8B accepts 1,048,576 input tokens compared to GPT-5 mini's 400,000 tokens. GPT-5 mini can generate longer responses up to 128,000 tokens, while Gemini 1.5 Flash 8B is limited to 8,192 tokens.

Google
Gemini 1.5 Flash 8B
Input1,048,576 tokens
Output8,192 tokens
OpenAI
GPT-5 mini
Input400,000 tokens
Output128,000 tokens
Tue Aug 25 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Gemini 1.5 Flash 8B and GPT-5 mini support multimodal inputs.

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

Gemini 1.5 Flash 8B

Text
Images
Audio
Video

GPT-5 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 8B

Proprietary

Closed source

GPT-5 mini

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 1.5 Flash 8B was released on 2024-03-15, while GPT-5 mini was released on 2025-08-07.

GPT-5 mini is 17 months newer than Gemini 1.5 Flash 8B.

Gemini 1.5 Flash 8B

Mar 15, 2024

2.4 years ago

GPT-5 mini

Aug 7, 2025

1.0 years ago

1.4yr newer

Knowledge Cutoff

When training data ends

Gemini 1.5 Flash 8B has a knowledge cutoff of 2024-10-01, while GPT-5 mini has a cutoff of 2024-05-30.

Gemini 1.5 Flash 8B has more recent training data (up to 2024-10-01), making it potentially better informed about events through that date compared to GPT-5 mini (2024-05-30).

Gemini 1.5 Flash 8B

Oct 2024

5 mo newer
GPT-5 mini

May 2024

Provider Availability

Gemini 1.5 Flash 8B is available from Google. GPT-5 mini is available from OpenAI.

Gemini 1.5 Flash 8B

google logo
Google
Input Price:Input: $0.07/1MOutput Price:Output: $0.30/1M

GPT-5 mini

openai logo
OpenAI
Input Price:Input: $0.25/1MOutput Price:Output: $2.00/1M
* 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 8B and GPT-5 mini side-by-side, then vote on the output you prefer.

Gemini 1.5 Flash 8B
✓ Preferred
GPT-5 mini
Open in Playground

FAQ

Common questions about Gemini 1.5 Flash 8B vs GPT-5 mini.

Which is better, Gemini 1.5 Flash 8B or GPT-5 mini?

GPT-5 mini significantly outperforms across most benchmarks. Gemini 1.5 Flash 8B is made by Google and GPT-5 mini 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 8B compare to GPT-5 mini in benchmarks?

Gemini 1.5 Flash 8B scores XSTest: 92.6%, FLEURS: 86.4%, Natural2Code: 75.5%, WMT23: 72.6%, Video-MME: 66.2%. GPT-5 mini scores AIME 2025: 91.1%, HMMT 2025: 87.8%, GPQA: 82.3%, FrontierMath: 22.1%, Humanity's Last Exam: 16.7%.

Is Gemini 1.5 Flash 8B cheaper than GPT-5 mini?

Gemini 1.5 Flash 8B is 3.6x cheaper for input tokens. Gemini 1.5 Flash 8B costs $0.07/M input and $0.30/M output via google. GPT-5 mini costs $0.25/M input and $2.00/M output via openai.

What are the context window sizes for Gemini 1.5 Flash 8B and GPT-5 mini?

Gemini 1.5 Flash 8B supports 1.0M tokens and GPT-5 mini supports 400K 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 8B and GPT-5 mini?

Key differences include context window (1.0M vs 400K), input pricing ($0.07 vs $0.25/M). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 1.5 Flash 8B and GPT-5 mini?

Gemini 1.5 Flash 8B is developed by Google and GPT-5 mini is developed by OpenAI.

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