Model Comparison

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

Gemini 1.5 Pro significantly outperforms across most benchmarks. Gemini 1.5 Flash 8B is 34.3x cheaper per token.

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

Gemini 1.5 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 1.5 Pro outperforms in 13 benchmarks (FLEURS, GPQA, HiddenMath, MATH, MathVista, MMLU-Pro, MMMU, MRCR, Natural2Code, Vibe-Eval, Video-MME, WMT23, XSTest), while Gemini 1.5 Flash 8B is better at 0 benchmarks. Gemini 1.5 Pro significantly outperforms across most benchmarks.

On price, Gemini 1.5 Flash 8B is roughly 34.3x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Gemini 1.5 Pro also accepts a larger context window (2,097,152 input tokens), making it the stronger choice for long documents and large codebases.

Choose Gemini 1.5 Pro if…

  • you want the strongest raw capability — it leads on 13 of 13 shared benchmarks
  • you process long inputs — it offers a 2,097,152 token context window
  • you want the most recent training data — it shipped May 2024

Choose Gemini 1.5 Flash 8B if…

  • cost matters — it's about 34.3x cheaper per token

Performance Benchmarks

Comparative analysis across standard metrics

13 benchmarks

Gemini 1.5 Pro outperforms in 13 benchmarks (FLEURS, GPQA, HiddenMath, MATH, MathVista, MMLU-Pro, MMMU, MRCR, Natural2Code, Vibe-Eval, Video-MME, WMT23, XSTest), while Gemini 1.5 Flash 8B is better at 0 benchmarks.

Gemini 1.5 Pro significantly outperforms across most benchmarks.

Wed Jul 01 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 1.5 Pro ($2.50/1M tokens) is 35.7x more expensive than Gemini 1.5 Flash 8B ($0.07/1M tokens).

For output processing, Gemini 1.5 Pro ($10.00/1M tokens) is 33.3x more expensive than Gemini 1.5 Flash 8B ($0.30/1M tokens).

In conclusion, Gemini 1.5 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
Wed Jul 01 2026 • llm-stats.com
Google
Gemini 1.5 Pro
Input tokens$2.50
Output tokens$10.00
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

Gemini 1.5 Pro accepts 2,097,152 input tokens compared to Gemini 1.5 Flash 8B's 1,048,576 tokens. Both models can generate responses up to 8,192 tokens.

Google
Gemini 1.5 Pro
Input2,097,152 tokens
Output8,192 tokens
Google
Gemini 1.5 Flash 8B
Input1,048,576 tokens
Output8,192 tokens
Wed Jul 01 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Gemini 1.5 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 1.5 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 1.5 Pro

Proprietary

Closed source

Gemini 1.5 Flash 8B

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 1.5 Pro was released on 2024-05-01, while Gemini 1.5 Flash 8B was released on 2024-03-15.

Gemini 1.5 Pro is 2 months newer than Gemini 1.5 Flash 8B.

Gemini 1.5 Pro

May 1, 2024

2.2 years ago

1mo newer
Gemini 1.5 Flash 8B

Mar 15, 2024

2.3 years ago

Knowledge Cutoff

When training data ends

Gemini 1.5 Pro has a knowledge cutoff of 2023-11-01, while Gemini 1.5 Flash 8B has a cutoff of 2024-10-01.

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 Gemini 1.5 Pro (2023-11-01).

Gemini 1.5 Pro

Nov 2023

Gemini 1.5 Flash 8B

Oct 2024

11 mo newer

Provider Availability

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

Gemini 1.5 Pro

google logo
Google
Input Price:Input: $2.50/1MOutput Price:Output: $10.00/1M

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
Larger context window (2,097,152 tokens)
Higher FLEURS score (93.3% vs 86.4%)
Higher GPQA score (59.1% vs 38.4%)
Higher HiddenMath score (52.0% vs 32.8%)
Higher MATH score (86.5% vs 58.7%)
Higher MathVista score (68.1% vs 54.7%)
Higher MMLU-Pro score (75.8% vs 58.7%)
Higher MMMU score (65.9% vs 53.7%)
Higher MRCR score (82.6% vs 54.7%)
Higher Natural2Code score (85.4% vs 75.5%)
Higher Vibe-Eval score (53.9% vs 40.9%)
Higher Video-MME score (78.6% vs 66.2%)
Higher WMT23 score (75.1% vs 72.6%)
Higher XSTest score (98.8% vs 92.6%)
Google
Less expensive input tokens
Less expensive output tokens
GoogleGemini 1.5 Pro
GoogleGemini 1.5 Flash 8B
Compare in Playground

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Gemini 1.5 Pro and Gemini 1.5 Flash 8B side-by-side, then vote on the output you prefer.

Gemini 1.5 Pro
✓ Preferred
Gemini 1.5 Flash 8B
Open in Playground
AI Model Comparison Table
Feature
Google
Gemini 1.5 Pro
Google
Gemini 1.5 Flash 8B

FAQ

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

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

Gemini 1.5 Pro significantly outperforms across most benchmarks. Gemini 1.5 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 1.5 Pro compare to Gemini 1.5 Flash 8B in benchmarks?

Gemini 1.5 Pro scores XSTest: 98.8%, FLEURS: 93.3%, HellaSwag: 93.3%, GSM8k: 90.8%, BIG-Bench Hard: 89.2%. Gemini 1.5 Flash 8B scores XSTest: 92.6%, FLEURS: 86.4%, Natural2Code: 75.5%, WMT23: 72.6%, Video-MME: 66.2%.

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

Gemini 1.5 Flash 8B is 35.7x cheaper for input tokens. Gemini 1.5 Pro costs $2.50/M input and $10.00/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 1.5 Pro and Gemini 1.5 Flash 8B?

Gemini 1.5 Pro supports 2.1M 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 1.5 Pro and Gemini 1.5 Flash 8B?

Key differences include context window (2.1M vs 1.0M), input pricing ($2.50 vs $0.07/M). See the full comparison above for benchmark-by-benchmark results.

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