Gemini 1.5 Pro vs Gemini 2.0 Flash
Gemini 2.0 Flash leads the LLM Stats Score 16.6 to 12.1. Gemini 2.0 Flash is 25.0x cheaper per token.
Google · Google · Updated for 2026
Which is better?
Gemini 2.0 Flash leads the overall LLM Stats Score 16.6 to 12.1, ranking #209 overall.
In the 8 individual benchmarks reported for both models, Gemini 2.0 Flash wins 7; this is a narrower head-to-head signal than the composite indexes.
On price, Gemini 2.0 Flash is roughly 25.0x 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 Pro
- you process long inputs — it offers a 2,097,152 token context window
Choose Gemini 2.0 Flash
- overall performance matters — it scores 16.6 and ranks #209 on LLM Stats
- you value its reported benchmark strengths — it wins 7 of 8 exact shared results
- cost matters — it's about 25.0x cheaper per token
- you want the most recent training data — it shipped Dec 2024
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
23 reported for Gemini 1.5 Pro · 13 for Gemini 2.0 Flash
Gemini 1.5 Pro outperforms in 1 benchmarks (MRCR), while Gemini 2.0 Flash is better at 7 benchmarks (GPQA, HiddenMath, MATH, MMLU-Pro, MMMU, Natural2Code, Vibe-Eval).
Gemini 2.0 Flash 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 Pro ($2.50/1M tokens) is 25.0x more expensive than Gemini 2.0 Flash ($0.10/1M tokens).
For output processing, Gemini 1.5 Pro ($10.00/1M tokens) is 25.0x more expensive than Gemini 2.0 Flash ($0.40/1M tokens).
In conclusion, Gemini 1.5 Pro is more expensive than Gemini 2.0 Flash.*
* 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 2.0 Flash'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 Pro and Gemini 2.0 Flash support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Gemini 1.5 Pro
Gemini 2.0 Flash
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 Pro was released on 2024-05-01, while Gemini 2.0 Flash was released on 2024-12-01.
Gemini 2.0 Flash is 7 months newer than Gemini 1.5 Pro.
May 1, 2024
2.3 years ago
Dec 1, 2024
1.8 years ago
7mo newerKnowledge Cutoff
When training data ends
Gemini 1.5 Pro has a knowledge cutoff of 2023-11-01, while Gemini 2.0 Flash has a cutoff of 2024-08-01.
Gemini 2.0 Flash has more recent training data (up to 2024-08-01), making it potentially better informed about events through that date compared to Gemini 1.5 Pro (2023-11-01).
Nov 2023
Aug 2024
9 mo newerProvider Availability
Gemini 1.5 Pro is available from Google. Gemini 2.0 Flash is available from Google.
Gemini 1.5 Pro
Gemini 2.0 Flash
Outputs Comparison
Judge for yourself.
Run your own prompts against Gemini 1.5 Pro and Gemini 2.0 Flash side-by-side, then vote on the output you prefer.
FAQ
Common questions about Gemini 1.5 Pro vs Gemini 2.0 Flash.