DeepSeek-V4-Flash vs GLM-5.3-Flash
Wins 3 of 7 areas
Facts · Math · Following instructions
Wins 2 of 7 areas
Coding · Agents
DeepSeek-V4-Flash wins more areas, narrowly.GLM-5.3-Flash is cheaper and better at coding.
Scores updated · 37 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.
- MathCompetition and research-level math30DeepSeek-V4-Flash3 of 3 tests
- FactsGetting facts right instead of making them up21DeepSeek-V4-Flash2 of 3 tests
- Following instructionsDoing exactly what it is asked10DeepSeek-V4-Flash1 of 1 test
- CodingWriting and fixing software15GLM-5.3-Flash5 of 6 tests
- AgentsCarrying out multi-step tasks on its own04GLM-5.3-Flash4 of 4 tests
- ReasoningHard problems that need careful thinking22Even2 each · 1 tie
- Long documentsFinding answers in very long texts00Even0 each · 1 tie
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.
GLM-5.3-Flash costs 63% less for the same work.
The biggest differences
The three tests each model wins by the widest margin. Scores are out of 100.
Where DeepSeek-V4-Flash pulls ahead
- Answers hard knowledge questions correctlyAA-Omniscience · Accuracy+12.9points ahead
- Follows detailed instructions exactlyLiveBench · Instruction Following+12.7points ahead
- Recent programming contest problemsLiveCodeBench v6+10points ahead
Where GLM-5.3-Flash pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+64.1points ahead
- Complex command-line tasks across many fieldsTerminal-Bench 4.0+20.7points ahead
- Finds the root cause of IT system incidentsAA IT-Bench SRE+19.7points ahead
Every test, side by side
All 37 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingGLM-5.3-Flash
- LMArena · WebDevGLM-5.3-Flash by 174 rating points14311605+174 rating
- LiveBench · Agentic CodingGLM-5.3-Flash by 1046.856.8+10
- LiveCodeBench v6DeepSeek-V4-Flash by 1090.680.6+10
- Terminal-Bench 2.1GLM-5.3-Flash by 5.678.784.3+5.6
- LiveBench · CodingGLM-5.3-Flash by 47579+4
- SciCodeGLM-5.3-Flash by 1.350.351.6+1.3
AgentsGLM-5.3-Flash
- Terminal-Bench 4.0GLM-5.3-Flash by 20.712.132.8+20.7
- AA IT-Bench SREGLM-5.3-Flash by 19.731.551.2+19.7
- GDPValGLM-5.3-Flash by 10.546.757.2+10.5
- τ-Bench V3 · BankingGLM-5.3-Flash by 7.839.447.2+7.8
ReasoningEven
- LiveBench · ReasoningDeepSeek-V4-Flash by 986.677.6+9
- ARC-AGI-2GLM-5.3-Flash by 4.461.465.8+4.4
- Humanity's Last ExamGLM-5.3-Flash by 1.338.639.9+1.3
- CritPtDeepSeek-V4-Flash by 1.216.615.4+1.2
- GPQA Diamondtie90.891.2tie
FactsDeepSeek-V4-Flash
- AA-Omniscience · Non-hallucinationGLM-5.3-Flash by 64.18.372.4+64.1
- AA-Omniscience · AccuracyDeepSeek-V4-Flash by 12.940.427.5+12.9
- SimpleQA VerifiedDeepSeek-V4-Flash by 2.134.132+2.1
MathDeepSeek-V4-Flash
- FrontierMath Tier 4DeepSeek-V4-Flash by 7.324.417.1+7.3
- LiveBench · MathematicsDeepSeek-V4-Flash by 5.686.881.2+5.6
- FrontierMath Tiers 1-3 (v2)DeepSeek-V4-Flash by 1.757.555.8+1.7
Following instructionsDeepSeek-V4-Flash
- LiveBench · Instruction FollowingDeepSeek-V4-Flash by 12.765.552.8+12.7
Other results14 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-OmniscienceGLM-5.3-Flash by 21.8-14.37.5+21.8
- AA Agentic IndexGLM-5.3-Flash by 9.541.751.2+9.5
- DeepSWE 1.1GLM-5.3-Flash by 954.463.4+9
- ToolathlonGLM-5.3-Flash by 8.170.378.4+8.1
- AA IntelligenceGLM-5.3-Flash by 7.534.341.8+7.5
- livebench_data_analysisDeepSeek-V4-Flash by 2.979.376.4+2.9
- MMLU-ProXDeepSeek-V4-Flash by 2.585.583+2.5
- Artificial Analysis Coding IndexGLM-5.3-Flash by 2.469.171.5+2.4
- NL2RepoGLM-5.3-Flash by 2.154.256.3+2.1
- ARC-AGI-1GLM-5.3-Flash by 28991+2
- livebench_languageDeepSeek-V4-Flash by 1.979.277.3+1.9
- Agents' Last ExamGLM-5.3-Flash by 1.125.226.3+1.1
- SciCode, subtasktie49.350tie
- HLE, text-onlytie35.836.5tie
Questions people ask
Which is better, DeepSeek-V4-Flash or GLM-5.3-Flash?
DeepSeek-V4-Flash wins three of the seven areas where both have results: facts, math and following instructions. GLM-5.3-Flash wins coding and agents, and costs 63% less. They are level on reasoning and long documents.
Which is better for coding?
GLM-5.3-Flash. It wins 5 of the 6 coding tests both models report; DeepSeek-V4-Flash wins 1.
Which is cheaper?
DeepSeek-V4-Flash costs $0.44 per million input tokens and $1.32 per million output tokens; GLM-5.3-Flash costs $0.15 and $0.50. That makes GLM-5.3-Flash about 63% cheaper for the same work.
How do you compare the two?
We use the 37 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 14 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.