GLM-5.1 vs GPT-4o mini
Wins 5 of 5 areas
Coding · Agents · Reasoning · Facts · Following instructions
Wins 0 of 5 areas
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GLM-5.1 is the stronger all-rounder.GPT-4o mini is cheaper.
Scores updated · 12 tests both models report · How we compare
Where each one wins
Tests won in each of the five 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 software30GLM-5.13 of 3 tests
- AgentsCarrying out multi-step tasks on its own20GLM-5.12 of 2 tests
- ReasoningHard problems that need careful thinking20GLM-5.12 of 2 tests
- FactsGetting facts right instead of making them up10GLM-5.11 of 1 test
- Following instructionsDoing exactly what it is asked10GLM-5.11 of 1 test
Facts 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.
GPT-4o mini costs 87% 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 GLM-5.1 pulls ahead
- Fixes real GitHub issues in Python projectsSWE-bench Verified+67.5points ahead
- Command-line tasks in a real terminalTerminal-Bench 2.1+56.2points ahead
- Follows unfamiliar, precisely checkable instructionsIFBench+45.3points ahead
Where GPT-4o mini pulls ahead
No clear win on a test scored out of 100.
Every test, side by side
All 12 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingGLM-5.1
- SWE-bench VerifiedGLM-5.1 by 67.576.28.7+67.5
- Terminal-Bench 2.1GLM-5.1 by 56.261.85.6+56.2
- SciCodeGLM-5.1 by 21.944.822.9+21.9
AgentsGLM-5.1
- GDPValGLM-5.1 by 31310+31
- τ-Bench V3 · BankingGLM-5.1 by 10.713.62.9+10.7
ReasoningGLM-5.1
- GPQA DiamondGLM-5.1 by 44.286.842.6+44.2
- Humanity's Last ExamGLM-5.1 by 25.930.14.2+25.9
Other results3 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.
- Artificial Analysis Coding IndexGLM-5.1 by 44.455.811.4+44.4
- MMLU-ProGLM-5.1 by 24.38661.7+24.3
- AA IntelligenceGLM-5.1 by 19.426.16.7+19.4
Questions people ask
Which is better, GLM-5.1 or GPT-4o mini?
GLM-5.1 wins all five areas where both have results: coding, agents, reasoning, facts and following instructions. GPT-4o mini wins none, but costs 87% less.
Which is better for coding?
GLM-5.1. It wins 3 of the 3 coding tests both models report; GPT-4o mini wins none.
Which is cheaper?
GLM-5.1 costs $1.38 per million input tokens and $4.40 per million output tokens; GPT-4o mini costs $0.15 and $0.60. That makes GPT-4o mini about 87% cheaper for the same work.
How do you compare the two?
We use the 12 benchmark tests both models have published scores on. The verdict counts the 9 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 3 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.