Multimodal
Directional only- Gemini 3.1 Flash-Lite
- 73.2
- Gemini 3 Pro
- 81.1
- Weighted basis
- 1 vs 2 rows
- Reading
- Directional only
Gemini 3.1 Flash-Lite vs Gemini 3 Pro
Updated September 3, 2026. Public scores include evidence status and uncertainty. They are not guarantees for a specific workload.
Decision reading
Gemini 3 Pro has the higher public score estimate, 67.41 versus 51.18, but the 90% score intervals overlap. Treat that as a lead, not a settled winner.
3 results are shared. Category rows based on different benchmark sets are marked directional and do not name a winner.
Which one for your work
Recommendations appear only when a shared evidence basis or an explicit operating constraint supports the call. Secondary and unsupported use cases stay disclosed below the initial list.
Long documents
Prompts that approach the documented context limit
Gemini 3 Pro
Gemini 3 Pro has the larger documented context window.
Confidence: documented
Chat turn cost
1K fresh input + 500 output tokens
Gemini 3.1 Flash-Lite
Gemini 3.1 Flash-Lite has the lower estimated token cost for this stated workload. Costs use the listed standard API rates.
Confidence: listed-rates
Cache-heavy agent loop cost
200K cached + 20K fresh input + 10K output tokens
Gemini 3.1 Flash-Lite
Gemini 3.1 Flash-Lite has the lower estimated token cost for this stated workload. Gemini 3 Pro has no published cached-input rate, so cached tokens use its listed input rate.
Confidence: rate-fallback
Show secondary and unsupported calls
Repository review cost
50K fresh input + 3K output tokens
Gemini 3.1 Flash-Lite
Gemini 3.1 Flash-Lite has the lower estimated token cost for this stated workload. Costs use the listed standard API rates.
Confidence: listed-rates
Coding work
Code generation, repair, and software-engineering tasks
Not enough matched evidence
No shared weighted benchmark basis supports a winner.
Confidence: limited
Agentic work
Tool use, computer use, and multi-step task completion
Not enough matched evidence
No shared weighted benchmark basis supports a winner.
Confidence: limited
What is actually comparable
Shared results can support a head-to-head reading. Results present for only one model describe coverage, not superiority.
3 Shared
9 Gemini 3 Pro only
- Shared results
- 3
- Gemini 3.1 Flash-Lite only
- 0
- Gemini 3 Pro only
- 9
- Like-for-like categories
- 0 / 8
1 category uses different evidence sets. Those rows remain visible for coverage context but do not name a winner.
Category results, on a stated basis
Each row states whether both averages use the same weighted benchmark set. Directional and not-comparable rows remain visible, but they never receive a winner in this template.
Agentic
Not comparable- Gemini 3.1 Flash-Lite
- Not measured
- Gemini 3 Pro
- Not measured
- Weighted basis
- 0 vs 0 rows
- Reading
- Not comparable
Coding
Not comparable- Gemini 3.1 Flash-Lite
- Not measured
- Gemini 3 Pro
- Not measured
- Weighted basis
- 0 vs 0 rows
- Reading
- Not comparable
Reasoning
Not comparable- Gemini 3.1 Flash-Lite
- Not measured
- Gemini 3 Pro
- 31.1
- Weighted basis
- 0 vs 1 rows
- Reading
- Not comparable
Knowledge
Not comparable- Gemini 3.1 Flash-Lite
- Not measured
- Gemini 3 Pro
- Not measured
- Weighted basis
- 0 vs 0 rows
- Reading
- Not comparable
Math
Not comparable- Gemini 3.1 Flash-Lite
- Not measured
- Gemini 3 Pro
- 32.9
- Weighted basis
- 0 vs 2 rows
- Reading
- Not comparable
Multilingual
Not comparable- Gemini 3.1 Flash-Lite
- Not measured
- Gemini 3 Pro
- Not measured
- Weighted basis
- 0 vs 0 rows
- Reading
- Not comparable
Instruction following
Not comparable- Gemini 3.1 Flash-Lite
- Not measured
- Gemini 3 Pro
- Not measured
- Weighted basis
- 0 vs 0 rows
- Reading
- Not comparable
| Category | Gemini 3.1 Flash-Lite | Gemini 3 Pro | Weighted basis | Reading |
|---|---|---|---|---|
| Multimodal | 73.2 | 81.1 | Directional only1 vs 2 rows | Directional only |
| Agentic | Not measured | Not measured | Not comparable0 vs 0 rows | Not comparable |
| Coding | Not measured | Not measured | Not comparable0 vs 0 rows | Not comparable |
| Reasoning | Not measured | 31.1 | Not comparable0 vs 1 rows | Not comparable |
| Knowledge | Not measured | Not measured | Not comparable0 vs 0 rows | Not comparable |
| Math | Not measured | 32.9 | Not comparable0 vs 2 rows | Not comparable |
| Multilingual | Not measured | Not measured | Not comparable0 vs 0 rows | Not comparable |
| Instruction following | Not measured | Not measured | Not comparable0 vs 0 rows | Not comparable |
Shape of the matched evidence
Only shared public evidence is shown. Sparse evidence stays a ruled list rather than being closed into a radar shape.
Too few matched category axes support a radar. The ruled list below shows only shared benchmark results; positions use each benchmark’s normalized display scale when available.
CharXiv
Multimodal
Gemini 3.1 Flash-Lite: 73.2%Gemini 3 Pro: 81.4%Normalized gap 8.2Gemini 3.1 Flash-Lite source Gemini 3 Pro source
What each workload costs
Three fixed token mixes turn per-token rates into comparable decisions. Each scenario states context fit and whether cached input had to fall back to the published list-input rate.
Chat turn
1K fresh input + 500 output tokens
- Gemini 3.1 Flash-Lite
- $0.001
- Fits in one request
- Gemini 3 Pro
- $0.008
- Fits in one request
Gemini 3.1 Flash-Lite has the lower modeled cost
Costs use the listed standard API rates.
Repository review
50K fresh input + 3K output tokens
- Gemini 3.1 Flash-Lite
- $0.017
- Fits in one request
- Gemini 3 Pro
- $0.136
- Fits in one request
Gemini 3.1 Flash-Lite has the lower modeled cost
Costs use the listed standard API rates.
Cache-heavy agent loop
200K cached + 20K fresh input + 10K output tokens
- Gemini 3.1 Flash-Lite
- $0.025
- Fits in one request
- Gemini 3 Pro
- $0.56
- Fits in one request
- Cached input priced at the published list-input rate
Gemini 3.1 Flash-Lite has the lower modeled cost
Gemini 3 Pro has no published cached-input rate, so cached tokens use its listed input rate.
Specification differences
Sourced differences are shown directly. Missing facts stay explicit instead of being inferred from a model name or family.
SpecificationGemini 3.1 Flash-LiteGemini 3 Pro
Context window
Maximum documented context; output-token limits may be lower.
Gemini 3.1 Flash-Lite
Gemini 3 Pro
2M
API model ID
Gemini 3.1 Flash-Lite
gemini-3.1-flash-lite
Google Gemini API pricingGemini 3 Pro
Not sourced
Cached-input rate
A missing cached-input rate falls back to the listed input rate only in the stated workload estimate.
Gemini 3.1 Flash-Lite
$0.025 per 1M cached input tokens
Google Gemini API pricingGemini 3 Pro
Not published
Documented inputs
Gemini 3.1 Flash-Lite
Not sourced
Gemini 3 Pro
Not sourced
Documented outputs
Gemini 3.1 Flash-Lite
Not sourced
Gemini 3 Pro
Not sourced
Provider availability
Gemini 3.1 Flash-Lite
Not sourced
Gemini 3 Pro
Not sourced
Reasoning profile
Gemini 3.1 Flash-Lite
Non-Reasoning
Gemini 3 Pro
Non-Reasoning
Weight access
Gemini 3.1 Flash-Lite
Proprietary
Gemini 3 Pro
Proprietary
License
Gemini 3.1 Flash-Lite
Proprietary
Gemini 3 Pro
Proprietary
Release date
Gemini 3.1 Flash-Lite
2026-03-03
Gemini 3 Pro
2025-11-18
If you already use one of these models
- Deployment change
- Both entries list Google as the provider. Confirm endpoint, model ID, limits, and feature support before switching.
- Quality signal
- Gemini 3 Pro has the higher public score estimate, 67.41 versus 51.18, but the 90% score intervals overlap.
- Workload cost
- Repository review: $0.017 vs $0.136. Cache-heavy agent loop: $0.025 vs $0.56.
- Context tradeoff
- Gemini 3 Pro has the larger documented window (2M).
Run the same representative tasks against both endpoints before changing production traffic.
Benchmark evidence
The full public result ledger is available for audit without forcing a wide desktop table onto a phone.
Browse raw public benchmark evidence12 rows
Agentic
Gert Labs
Shared sourceGemini 3.1 Flash-Lite38.46%Gemini 3 Pro63.23%Gemini 3 Pro leads this result
JobBench
Gemini 3.1 Flash-Lite—Gemini 3 Pro11.4%SourceNot directly comparable
Coding
Vibe Code Bench
Shared sourceGemini 3.1 Flash-Lite0.00%Gemini 3 Pro14.30%Gemini 3 Pro leads this result
Reasoning
ARC-AGI-2
Gemini 3.1 Flash-Lite—Gemini 3 Pro31.1%SourceNot directly comparable
Math
Multimodal
CharXiv
Gemini 3.1 Flash-Lite73.2%SourceGemini 3 Pro81.4%SourceGemini 3 Pro leads this result
MMMU-Pro
Gemini 3.1 Flash-Lite—Gemini 3 Pro81%SourceNot directly comparable
MathVision
Gemini 3.1 Flash-Lite—Gemini 3 Pro86.6%SourceNot directly comparable
VideoMMMU
Gemini 3.1 Flash-Lite—Gemini 3 Pro87.6%SourceNot directly comparable
ScreenSpot Pro
Gemini 3.1 Flash-Lite—Gemini 3 Pro72.7%SourceNot directly comparable
V*
Gemini 3.1 Flash-Lite—Gemini 3 Pro88.0%SourceNot directly comparable
Frequently asked questions
Which is better, Gemini 3.1 Flash-Lite or Gemini 3 Pro?
Gemini 3 Pro has the higher public score estimate, 67.41 versus 51.18, but the 90% score intervals overlap. The higher estimate is not a decisive winner because the uncertainty ranges overlap.
Which is better for coding, Gemini 3.1 Flash-Lite or Gemini 3 Pro?
The published evidence does not provide a shared weighted coding basis for both models, so BenchLM does not name a coding winner.
Which is better for agentic tasks, Gemini 3.1 Flash-Lite or Gemini 3 Pro?
The published evidence does not provide a shared weighted agentic tasks basis for both models, so BenchLM does not name a agentic tasks winner.
Which costs less, Gemini 3.1 Flash-Lite or Gemini 3 Pro?
For the stated presets, chat costs $0.001 on Gemini 3.1 Flash-Lite and $0.008 on Gemini 3 Pro; repository review costs $0.017 and $0.136; the cache-heavy agent loop costs $0.025 and $0.56. Gemini 3 Pro has no published cached-input rate, so cached tokens use its listed input rate.
Which has the larger context window, Gemini 3.1 Flash-Lite or Gemini 3 Pro?
Gemini 3 Pro has the larger documented context window: 2M, compared with 1M.
Related comparisons
Last updated September 3, 2026
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