Model Comparison

Gemini 3 Pro vs Gemini 1.5 Flash 8BWhich is better in 2026?

Gemini 3 Pro significantly outperforms across most benchmarks. Gemini 1.5 Flash 8B is 35.3x cheaper per token.

Verdict: Gemini 3 Pro vs Gemini 1.5 Flash 8B — which is better?

Gemini 3 Pro (by Google) and Gemini 1.5 Flash 8B (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.

Gemini 3 Pro outperforms in 1 benchmarks (GPQA), while Gemini 1.5 Flash 8B is better at 0 benchmarks. Gemini 3 Pro significantly outperforms across most benchmarks.

On price, Gemini 1.5 Flash 8B is roughly 35.3x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Choose Gemini 3 Pro if…

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

Choose Gemini 1.5 Flash 8B if…

  • cost matters — it's about 35.3x cheaper per token
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Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Gemini 3 Pro outperforms in 1 benchmarks (GPQA), while Gemini 1.5 Flash 8B is better at 0 benchmarks.

Gemini 3 Pro significantly outperforms across most benchmarks.

Sun Jun 07 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Gemini 1.5 Flash 8B costs less

For input processing, Gemini 3 Pro ($2.00/1M tokens) is 28.6x more expensive than Gemini 1.5 Flash 8B ($0.07/1M tokens).

For output processing, Gemini 3 Pro ($12.00/1M tokens) is 40.0x more expensive than Gemini 1.5 Flash 8B ($0.30/1M tokens).

In conclusion, Gemini 3 Pro 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
Sun Jun 07 2026 • llm-stats.com
Google
Gemini 3 Pro
Input tokens$2.00
Output tokens$12.00
Best providerGoogle
Google
Gemini 1.5 Flash 8B
Input tokens$0.07
Output tokens$0.30
Best providerGoogle
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Both models have the same input context window of 1,048,576 tokens. Gemini 3 Pro can generate longer responses up to 65,536 tokens, while Gemini 1.5 Flash 8B is limited to 8,192 tokens.

Google
Gemini 3 Pro
Input1,048,576 tokens
Output65,536 tokens
Google
Gemini 1.5 Flash 8B
Input1,048,576 tokens
Output8,192 tokens
Sun Jun 07 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Gemini 3 Pro and Gemini 1.5 Flash 8B support multimodal inputs.

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

Gemini 3 Pro

Text
Images
Audio
Video

Gemini 1.5 Flash 8B

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 3 Pro

Proprietary

Closed source

Gemini 1.5 Flash 8B

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 3 Pro was released on 2025-11-18, while Gemini 1.5 Flash 8B was released on 2024-03-15.

Gemini 3 Pro is 20 months newer than Gemini 1.5 Flash 8B.

Gemini 3 Pro

Nov 18, 2025

6 months ago

1.7yr newer
Gemini 1.5 Flash 8B

Mar 15, 2024

2.2 years ago

Knowledge Cutoff

When training data ends

Gemini 3 Pro has a knowledge cutoff of 2025-01-31, while Gemini 1.5 Flash 8B has a cutoff of 2024-10-01.

Gemini 3 Pro has more recent training data (up to 2025-01-31), making it potentially better informed about events through that date compared to Gemini 1.5 Flash 8B (2024-10-01).

Gemini 3 Pro

Jan 2025

3 mo newer
Gemini 1.5 Flash 8B

Oct 2024

Provider Availability

Gemini 3 Pro is available from Google. Gemini 1.5 Flash 8B is available from Google.

Gemini 3 Pro

google logo
Google
Input Price:Input: $2.00/1MOutput Price:Output: $12.00/1M

Gemini 1.5 Flash 8B

google logo
Google
Input Price:Input: $0.07/1MOutput Price:Output: $0.30/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

Google
Higher GPQA score (91.9% vs 38.4%)
Google
Less expensive input tokens
Less expensive output tokens
GoogleGemini 3 Pro
GoogleGemini 1.5 Flash 8B
Compare in Playground

Detailed Comparison

AI Model Comparison Table
Feature
Google
Gemini 3 Pro
Google
Gemini 1.5 Flash 8B

FAQ

Common questions about Gemini 3 Pro vs Gemini 1.5 Flash 8B.

Which is better, Gemini 3 Pro or Gemini 1.5 Flash 8B?

Gemini 3 Pro significantly outperforms across most benchmarks. Gemini 3 Pro is made by Google and Gemini 1.5 Flash 8B is made by Google. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Gemini 3 Pro compare to Gemini 1.5 Flash 8B in benchmarks?

Gemini 3 Pro scores AIME 2025: 100.0%, Vending-Bench 2: 100.0%, Global PIQA: 93.4%, GPQA: 91.9%, MMMLU: 91.8%. Gemini 1.5 Flash 8B scores XSTest: 92.6%, FLEURS: 86.4%, Natural2Code: 75.5%, WMT23: 72.6%, Video-MME: 66.2%.

Is Gemini 3 Pro cheaper than Gemini 1.5 Flash 8B?

Gemini 1.5 Flash 8B is 28.6x cheaper for input tokens. Gemini 3 Pro costs $2.00/M input and $12.00/M output via google. Gemini 1.5 Flash 8B costs $0.07/M input and $0.30/M output via google.

What are the context window sizes for Gemini 3 Pro and Gemini 1.5 Flash 8B?

Gemini 3 Pro supports 1.0M tokens and Gemini 1.5 Flash 8B 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 Gemini 3 Pro and Gemini 1.5 Flash 8B?

Key differences include input pricing ($2.00 vs $0.07/M). See the full comparison above for benchmark-by-benchmark results.

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