Compare · ModelsLive · 2 picked · head to head

Gemini 2.5 Flash Lite vs Gemini 3.1 Pro Preview

Side by side · benchmarks, pricing, and signals you can act on.

Winner summary

Gemini 3.1 Pro Preview wins 3 of 3 shared benchmarks. Leads in speed.

Category leads
speed·Gemini 3.1 Pro Preview
Hype vs Reality
Gemini 2.5 Flash Lite
#44 by perf·no signal
QUIET
Gemini 3.1 Pro Preview
#38 by perf·no signal
QUIET
Best value
27.3x better value than Gemini 3.1 Pro Preview
Gemini 2.5 Flash Lite
236.4 pts/$
$0.25/M
Gemini 3.1 Pro Preview
8.7 pts/$
$7.00/M
Vendor risk
Google DeepMind logo
Google DeepMind
$4.00T·Tier 1
Low risk
Google DeepMind logo
Google DeepMind
$4.00T·Tier 1
Low risk
Head to head
Gemini 2.5 Flash LiteGemini 3.1 Pro Preview
Artificial Analysis · Agentic Index
Gemini 3.1 Pro Preview leads by +47.4
Artificial Analysis Agentic Index · a composite score measuring how well a model performs in agentic workflows · multi-step tool use, planning, error recovery, and autonomous task completion. Aggregates results from multiple agentic benchmarks including SWE-bench, tool-use tests, and planning evaluations. The canonical single-number metric for "how good is this model as an agent?"
Gemini 2.5 Flash Lite
11.7
Gemini 3.1 Pro Preview
59.1
Artificial Analysis · Coding Index
Gemini 3.1 Pro Preview leads by +37.4
Artificial Analysis Coding Index · a composite score that aggregates performance across multiple coding benchmarks into a single index. Tracks code generation quality, debugging ability, multi-language competence, and real-world software engineering tasks. Used by Artificial Analysis to rank model coding capability in a normalized, comparable format. Useful for developers choosing between models for coding-heavy workloads.
Gemini 2.5 Flash Lite
18.1
Gemini 3.1 Pro Preview
55.5
Artificial Analysis · Quality Index
Gemini 3.1 Pro Preview leads by +35.5
Gemini 2.5 Flash Lite
21.6
Gemini 3.1 Pro Preview
57.2
Full benchmark table
BenchmarkGemini 2.5 Flash LiteGemini 3.1 Pro Preview
Artificial Analysis · Agentic Index
Artificial Analysis Agentic Index · a composite score measuring how well a model performs in agentic workflows · multi-step tool use, planning, error recovery, and autonomous task completion. Aggregates results from multiple agentic benchmarks including SWE-bench, tool-use tests, and planning evaluations. The canonical single-number metric for "how good is this model as an agent?"
11.759.1
Artificial Analysis · Coding Index
Artificial Analysis Coding Index · a composite score that aggregates performance across multiple coding benchmarks into a single index. Tracks code generation quality, debugging ability, multi-language competence, and real-world software engineering tasks. Used by Artificial Analysis to rank model coding capability in a normalized, comparable format. Useful for developers choosing between models for coding-heavy workloads.
18.155.5
Artificial Analysis · Quality Index
21.657.2
Pricing · per 1M tokens · projected $/mo at 10M tokens
ModelInputOutputContextProjected $/mo
Google DeepMind logoGemini 2.5 Flash Lite$0.10$0.401.0M tokens (~524 books)$1.75
Google DeepMind logoGemini 3.1 Pro Preview$2.00$12.001.0M tokens (~524 books)$45.00