Gemma 4 26B A4B vs GPT-5.5
Wins 1 of 8 areas
Facts
Wins 7 of 8 areas
Coding · Agents · Reasoning · Images and charts · Math · Long documents · Following instructions
GPT-5.5 is the stronger all-rounder.Gemma 4 26B A4B is cheaper and better at facts.
Scores updated · 40 tests both models report · How we compare
Where each one wins
Tests won in each of the eight areas we test. 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 software05GPT-5.55 of 5 tests
- AgentsCarrying out multi-step tasks on its own05GPT-5.55 of 5 tests
- ReasoningHard problems that need careful thinking03GPT-5.53 of 3 tests
- Images and chartsUnderstanding pictures, charts and video03GPT-5.53 of 3 tests
- MathCompetition and research-level math02GPT-5.52 of 2 tests
- Long documentsFinding answers in very long texts01GPT-5.51 of 1 test
- Following instructionsDoing exactly what it is asked01GPT-5.51 of 1 test
- FactsGetting facts right instead of making them up21Gemma 4 26B A4B2 of 3 tests
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.
Gemma 4 26B A4B costs 98% 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-5.5 pulls ahead
- Finds hard-to-locate facts by browsing the webBrowseComp+58.1points ahead
- Hard command-line tasks in a real terminalTerminal-Bench Hard+47points ahead
- Command-line tasks in a real terminalTerminal-Bench 2.1+45.3points ahead
Where Gemma 4 26B A4B pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+2.6points ahead
Every test, side by side
All 40 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingGPT-5.5
- Terminal-Bench HardGPT-5.5 by 4713.660.6+47
- Terminal-Bench 2.1GPT-5.5 by 45.33984.3+45.3
- SWE-bench ProGPT-5.5 by 44.813.858.6+44.8
- SciCodeGPT-5.5 by 15.84055.8+15.8
- LMArena · WebDevGPT-5.5 by 154 rating points13591513+154 rating
AgentsGPT-5.5
- BrowseCompGPT-5.5 by 58.126.384.4+58.1
- GDPValGPT-5.5 by 39.33.442.7+39.3
- τ-Bench V3 · BankingGPT-5.5 by 271239+27
- MCP AtlasGPT-5.5 by 25.35075.3+25.3
- AA IT-Bench SREGPT-5.5 by 22.223.645.8+22.2
ReasoningGPT-5.5
- CritPtGPT-5.5 by 27.1027.1+27.1
- Humanity's Last ExamGPT-5.5 by 26.519.345.8+26.5
- GPQA DiamondGPT-5.5 by 14.379.293.5+14.3
FactsGemma 4 26B A4B
- AA-Omniscience · AccuracyGPT-5.5 by 38.919.158+38.9
- Vectara HHEM hallucination ratelower is betterGemma 4 26B A4B by 4.15.29.3+4.1
- AA-Omniscience · Non-hallucinationGemma 4 26B A4B by 2.613.611+2.6
Images and chartsGPT-5.5
- MMMU-ProGPT-5.5 by 10.769.279.9+10.7
- MathVistaGPT-5.5 by 4.879.484.2+4.8
- LMArena · VisionGPT-5.5 by 32 rating points12601292+32 rating
MathGPT-5.5
- HMMT Feb. 2026GPT-5.5 by 17.77996.7+17.7
- AIME 2026GPT-5.5 by 1088.398.3+10
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.
- AA-OmniscienceGPT-5.5 by 71.3-50.820.5+71.3
- GDPval-AA v2GPT-5.5 by 702 rating points8071509+702 rating
- τ²-Bench Telecom (AA run)GPT-5.5 by 50.343.693.9+50.3
- Terminal-Bench 2.0GPT-5.5 by 48.534.282.7+48.5
- Tool-DecathlonGPT-5.5 by 43.61255.6+43.6
- NL2RepoGPT-5.5 by 39.111.650.7+39.1
- Artificial Analysis Coding IndexGPT-5.5 by 35.639.374.9+35.6
- HLE (with tools)GPT-5.5 by 3517.252.2+35
- AA Agentic IndexGPT-5.5 by 26.31137.3+26.3
- AA IntelligenceGPT-5.5 by 21.716.738.4+21.7
- SuperGPQAGPT-5.5 by 11.361.472.7+11.3
- RealWorldQAGPT-5.5 by 1072.282.2+10
- HMMT Nov. 2025GPT-5.5 by 987.596.5+9
- SimpleVQAGPT-5.5 by 6.452.258.6+6.4
- vectara_avg_summary_lengthGPT-5.5 by 62.5 rating points67.1129.6+62.5 rating
- vectara_factual_consistencyGemma 4 26B A4B by 4.194.890.7+4.1
- vectara_answer_ratetie99.8100tie
Questions people ask
Which is better, Gemma 4 26B A4B or GPT-5.5?
GPT-5.5 wins seven of the eight areas we test: coding, agents, reasoning, images and charts, math, long documents and following instructions. Gemma 4 26B A4B wins facts, and costs 98% less.
Which is better for coding?
GPT-5.5. It wins 5 of the 5 coding tests both models report; Gemma 4 26B A4B wins none.
Which is cheaper?
Gemma 4 26B A4B costs $0.13 per million input tokens and $0.40 per million output tokens; GPT-5.5 costs $5.00 and $30.00. That makes Gemma 4 26B A4B about 98% cheaper for the same work.
How do you compare the two?
We use the 40 benchmark tests both models have published scores on. The verdict counts the 23 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.