Gemini 2.5 Flash Lite vs GPT-5
Wins 1 of 7 areas
Facts
Wins 6 of 7 areas
Coding · Agents · Reasoning · Images and charts · Long documents · Following instructions
GPT-5 is the stronger all-rounder.Gemini 2.5 Flash Lite is cheaper and better at facts.
Scores updated · 31 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 software03GPT-53 of 3 tests
- ReasoningHard problems that need careful thinking03GPT-53 of 3 tests
- Images and chartsUnderstanding pictures, charts and video02GPT-52 of 2 tests
- AgentsCarrying out multi-step tasks on its own01GPT-51 of 1 test
- Long documentsFinding answers in very long texts01GPT-51 of 1 test
- Following instructionsDoing exactly what it is asked01GPT-51 of 1 test
- FactsGetting facts right instead of making them up21Gemini 2.5 Flash Lite2 of 3 tests
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 GPT-5 pulls ahead
- Fixes real GitHub issues in Python projectsSWE-bench Verified+43.3points ahead
- Hard command-line tasks in a real terminalTerminal-Bench Hard+28.1points ahead
- Code for real scientific research problemsSciCode+23.6points ahead
Where Gemini 2.5 Flash Lite pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+4.8points ahead
Every test, side by side
All 31 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingGPT-5
- SWE-bench VerifiedGPT-5 by 43.331.674.9+43.3
- Terminal-Bench HardGPT-5 by 28.14.532.6+28.1
- SciCodeGPT-5 by 23.619.342.9+23.6
ReasoningGPT-5
- GPQA DiamondGPT-5 by 22.962.585.4+22.9
- Humanity's Last ExamGPT-5 by 21.76.828.5+21.7
- CritPtGPT-5 by 5.705.7+5.7
FactsGemini 2.5 Flash Lite
- AA-Omniscience · AccuracyGPT-5 by 22.417.940.3+22.4
- Vectara HHEM hallucination ratelower is betterGemini 2.5 Flash Lite by 11.83.315.1+11.8
- AA-Omniscience · Non-hallucinationGemini 2.5 Flash Lite by 4.822.617.8+4.8
Images and chartsGPT-5
Other results17 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.
- τ²-Bench Telecom (AA run)GPT-5 by 66.418.484.8+66.4
- Aider-PolyglotGPT-5 by 61.326.788+61.3
- LiveCodeBenchGPT-5 by 49.833.783.5+49.8
- AIME 2025GPT-5 by 44.849.894.6+44.8
- AA-OmniscienceGPT-5 by 36.9-45.6-8.7+36.9
- HarmBenchGPT-5 by 30.66797.6+30.6
- Artificial Analysis Coding IndexGPT-5 by 28.39.537.8+28.3
- AIR-Bench 2024GPT-5 by 21.965.887.7+21.9
- AA Agentic IndexGPT-5 by 20.46.126.5+20.4
- AA IntelligenceGPT-5 by 14.58.523+14.5
- vectara_factual_consistencyGemini 2.5 Flash Lite by 11.896.784.9+11.8
- vectara_avg_summary_lengthGPT-5 by 67 rating points95.7162.7+67 rating
- simple_safety_testsGPT-5 by 3.396.599.8+3.3
- bbqGPT-5 by 1.994.996.8+1.9
- XSTesttie97.897.1tie
- anthropic_red_teamtie98.799.1tie
- vectara_answer_ratetie99.599.9tie
Questions people ask
Which is better, Gemini 2.5 Flash Lite or GPT-5?
GPT-5 wins six of the seven areas where both have results: coding, agents, reasoning, images and charts, long documents and following instructions. Gemini 2.5 Flash Lite wins facts, and costs 96% less.
Which is better for coding?
GPT-5. 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; GPT-5 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 31 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 17 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.