Gemini 2.5 Flash Lite vs Gemini 2.5 Pro
Wins 2 of 7 areas
Facts · Following instructions
Wins 4 of 7 areas
Coding · Reasoning · Images and charts · Long documents
Gemini 2.5 Pro wins more areas, narrowly.Gemini 2.5 Flash Lite is cheaper and better at facts.
Scores updated · 33 tests both models report · How we compare
Where each one wins
Tests won in each of the seven areas where both have results. Each piece is one test, so a longer bar means more evidence; grey means the two scored within a point of each other.
- CodingWriting and fixing software03Gemini 2.5 Pro3 of 3 tests
- ReasoningHard problems that need careful thinking03Gemini 2.5 Pro3 of 3 tests
- Images and chartsUnderstanding pictures, charts and video02Gemini 2.5 Pro2 of 2 tests
- Long documentsFinding answers in very long texts01Gemini 2.5 Pro1 of 1 test
- FactsGetting facts right instead of making them up21Gemini 2.5 Flash Lite2 of 3 tests
- Following instructionsDoing exactly what it is asked10Gemini 2.5 Flash Lite1 of 1 test
- AgentsCarrying out multi-step tasks on its own00Even0 each · 1 tie
Agents, long documents and following instructions rest on a single test each.
What it costs
Prices per million tokens, roughly 750,000 words. The bars show the cost of a million tokens read plus a million written.
Gemini 2.5 Flash Lite costs 96% less for the same work.
The biggest differences
The tests each model wins by the widest margin, up to three each. Scores are out of 100.
Where Gemini 2.5 Pro pulls ahead
- Fixes real GitHub issues in Python projectsSWE-bench Verified+31.6points ahead
- Code for real scientific research problemsSciCode+27points ahead
- Hard command-line tasks in a real terminalTerminal-Bench Hard+22points ahead
Where Gemini 2.5 Flash Lite pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+13.5points ahead
- Follows unfamiliar, precisely checkable instructionsIFBench+1.2points ahead
Every test, side by side
All 33 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingGemini 2.5 Pro
- SWE-bench VerifiedGemini 2.5 Pro by 31.631.663.2+31.6
- SciCodeGemini 2.5 Pro by 2719.346.3+27
- Terminal-Bench HardGemini 2.5 Pro by 224.526.5+22
ReasoningGemini 2.5 Pro
- GPQA DiamondGemini 2.5 Pro by 21.162.583.6+21.1
- Humanity's Last ExamGemini 2.5 Pro by 11.26.818+11.2
- CritPtGemini 2.5 Pro by 2.602.6+2.6
FactsGemini 2.5 Flash Lite
- AA-Omniscience · AccuracyGemini 2.5 Pro by 21.217.939+21.2
- AA-Omniscience · Non-hallucinationGemini 2.5 Flash Lite by 13.522.69.1+13.5
- Vectara HHEM hallucination ratelower is betterGemini 2.5 Flash Lite by 3.73.37+3.7
Images and chartsGemini 2.5 Pro
Following instructionsGemini 2.5 Flash Lite
- IFBenchGemini 2.5 Flash Lite by 1.249.948.7+1.2
Other results19 tests, not counted
Tests outside the eight areas. They are not counted above: several are summary scores built from other tests, or the same test under another name.
- Aider-PolyglotGemini 2.5 Pro by 49.826.776.5+49.8
- LiveCodeBenchGemini 2.5 Pro by 40.533.774.2+40.5
- SimpleQAGemini 2.5 Pro by 40.110.750.8+40.1
- Artificial Analysis Coding IndexGemini 2.5 Pro by 37.29.546.7+37.2
- τ²-Bench Telecom (AA run)Gemini 2.5 Pro by 35.718.454.1+35.7
- AIME 2025Gemini 2.5 Pro by 33.249.883+33.2
- AA-OmniscienceGemini 2.5 Pro by 29.3-45.6-16.4+29.3
- AIR-Bench 2024Gemini 2.5 Pro by 7.865.873.6+7.8
- Global-MMLU-LiteGemini 2.5 Pro by 7.581.188.6+7.5
- AA IntelligenceGemini 2.5 Pro by 6.58.515+6.5
- vectara_factual_consistencyGemini 2.5 Flash Lite by 3.796.793+3.7
- AA Agentic IndexGemini 2.5 Flash Lite by 2.66.13.5+2.6
- HarmBenchGemini 2.5 Flash Lite by 1.66765.4+1.6
- bbqGemini 2.5 Pro by 1.594.996.4+1.5
- vectara_avg_summary_lengthGemini 2.5 Pro by 10.7 rating points95.7106.4+10.7 rating
- XSTesttie97.898.7tie
- anthropic_red_teamtie98.799.5tie
- simple_safety_teststie96.597tie
- vectara_answer_ratetie99.599.1tie
Questions people ask
Which is better, Gemini 2.5 Flash Lite or Gemini 2.5 Pro?
Gemini 2.5 Pro wins four of the seven areas where both have results: coding, reasoning, images and charts and long documents. Gemini 2.5 Flash Lite wins facts and following instructions, and costs 96% less. They are level on agents.
Which is better for coding?
Gemini 2.5 Pro. It wins 3 of the 3 coding tests both models report; Gemini 2.5 Flash Lite wins none.
Which is cheaper?
Gemini 2.5 Flash Lite costs $0.10 per million input tokens and $0.40 per million output tokens; Gemini 2.5 Pro costs $1.25 and $10.00. That makes Gemini 2.5 Flash Lite about 96% cheaper for the same work.
How do you compare the two?
We use the 33 benchmark tests both models have published scores on. The verdict counts the 14 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 19 are listed but not counted, because several are summary scores or repeat a test. Each score is the one shown on the model's own page.