Gemini 1.5 Flash 8B vs Gemini 1.5 Pro
Gemini 1.5 Pro leads the LLM Stats Score 12.5 to -0.2. Gemini 1.5 Flash 8B is 34.3x cheaper per token.
Google · Google · Updated for 2026
Which is better?
Gemini 1.5 Pro leads the overall LLM Stats Score 12.5 to -0.2, ranking #233 overall.
In the 13 individual benchmarks reported for both models, Gemini 1.5 Pro wins 13; this is a narrower head-to-head signal than the composite indexes.
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.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Gemini 1.5 Flash 8B
- cost matters — it's about 34.3x cheaper per token
Choose Gemini 1.5 Pro
- overall performance matters — it scores 12.5 and ranks #233 on LLM Stats
- your work emphasizes reasoning — it leads those capability indexes
- you value its reported benchmark strengths — it wins 13 of 13 exact shared results
- you process long inputs — it offers a 2,097,152 token context window
- you want the most recent training data — it shipped May 2024
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
13 reported for Gemini 1.5 Flash 8B · 23 for Gemini 1.5 Pro
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.
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 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
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.
Input capabilities
Documented input modalities across available providers
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
Gemini 1.5 Pro
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
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.
Mar 15, 2024
2.5 years ago
May 1, 2024
2.3 years ago
1mo newerKnowledge 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).
Oct 2024
11 mo newerNov 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
Gemini 1.5 Pro
Outputs Comparison
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.
FAQ
Common questions about Gemini 1.5 Flash 8B vs Gemini 1.5 Pro.