Model Comparison

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

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

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

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

Performance Benchmarks

Comparative analysis across standard metrics

13 benchmarks

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

Gemini 1.5 Pro significantly outperforms across most benchmarks.

Tue Jun 30 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 Flash 8B ($0.07/1M tokens) is 35.7x cheaper than Gemini 1.5 Pro ($2.50/1M tokens).

For output processing, Gemini 1.5 Flash 8B ($0.30/1M tokens) is 33.3x cheaper than Gemini 1.5 Pro ($10.00/1M 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
Tue Jun 30 2026 • llm-stats.com
Google
Gemini 1.5 Flash 8B
Input tokens$0.07
Output tokens$0.30
Best providerGoogle
Google
Gemini 1.5 Pro
Input tokens$2.50
Output tokens$10.00
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 Flash 8B
Input1,048,576 tokens
Output8,192 tokens
Google
Gemini 1.5 Pro
Input2,097,152 tokens
Output8,192 tokens
Tue Jun 30 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Gemini 1.5 Flash 8B and Gemini 1.5 Pro 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

Gemini 1.5 Pro

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

Gemini 1.5 Pro

Proprietary

Closed source

Release Timeline

When each model was launched

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

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

Gemini 1.5 Flash 8B

Mar 15, 2024

2.3 years ago

Gemini 1.5 Pro

May 1, 2024

2.2 years ago

1mo newer

Knowledge Cutoff

When training data ends

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

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 Flash 8B

Oct 2024

11 mo newer
Gemini 1.5 Pro

Nov 2023

Provider Availability

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

Gemini 1.5 Flash 8B

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

Gemini 1.5 Pro

google logo
Google
Input Price:Input: $2.50/1MOutput Price:Output: $10.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Google
Less expensive input tokens
Less expensive output tokens
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%)
GoogleGemini 1.5 Flash 8B
GoogleGemini 1.5 Pro
Compare in Playground

Detailed Comparison

Interactive Arena

Judge for yourself.

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

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

FAQ

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

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

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

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

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

Gemini 1.5 Flash 8B is 35.7x cheaper for input tokens. Gemini 1.5 Flash 8B costs $0.07/M input and $0.30/M output via google. Gemini 1.5 Pro costs $2.50/M input and $10.00/M output via google.

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

Gemini 1.5 Flash 8B supports 1.0M tokens and Gemini 1.5 Pro supports 2.1M 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 Gemini 1.5 Pro?

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

Related comparisons