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GLM 5.3 Flash vs Mistral Medium 3.1

GLM 5.3 Flash leads Mistral Medium 3.1 on the Artificial Analysis Intelligence Index, 41.8 to 9.2, and GLM 5.3 Flash costs 4.0x less per output token ($0.50 vs $2.00 per million). Updated October 21, 2026; 57 benchmarks have a result for both.

Replace GLM 5.3 Flash Replace Mistral Medium 3.1
GLM 5.3 FlashZ.ai
Coding
57.7
Overall
66.0
Output $/M
$0.50
57
Mistral Medium 3.1Mistral AI
Coding
No data
Overall
No data
Output $/M
$2.00
0
vs boards won of 57 shared

GLM 5.3 Flash or Mistral Medium 3.1: which to pick

Only GLM 5.3 Flash has a coding score, 57.7 on the Vibe Coding Index; Mistral Medium 3.1 has none, so the two cannot be ranked on coding.

Compare them on price, context and the boards below.

Model AGLM 5.3 FlashZ.ai57.7/1006 independent benchmarks$0.02 per solved taskModel BMistral Medium 3.1Mistral AINot benchmarkedNo coding benchmarkNo cost per solved task
Shared results
57
GLM 5.3 Flash only
45
Mistral Medium 3.1 only
17
Like-for-like categories
8 of 9

Only benchmarks that tested both models count toward a pick; a result only one model has is shown but not compared.

Which one for your work

Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.

At a glance

Coding index
GLM 5.3 Flash 57.7 from 6 benchmarks, Mistral Medium 3.1 not benchmarked.
Widest category
Agentic work, 49.0 points apart on average over 1 shared benchmark.
Widest single gap
AA Coding Index: GLM 5.3 Flash 71.5 against Mistral Medium 3.1 20.5, 51.0 points apart on a 0 to 100 scale.
Output price
GLM 5.3 Flash $0.50 against Mistral Medium 3.1 $2.00 per million output tokens, 4.0x apart.
Context window
GLM 5.3 Flash takes 1.05M tokens, Mistral Medium 3.1 131K.

Benchmark by benchmark

First the score: boards each model leads, per category, where both have a result. Then every board, a category to a fold; bars are each result on a 0 to 100 scale, so compare the two in a row, not one row with another.

Boards won, where both have a result
CategoryGLM 5.3 FlashBarsMistral Medium 3.1Ties
Coding60
Intelligence10
Agentic work10
Reasoning80
Math20
Knowledge70
Web design80
General240
All shared boards570
CodingLike-for-likeSix of these boards feed the Vibe Coding Index60
Coding benchmarks for GLM 5.3 Flash and Mistral Medium 3.1
BenchmarkGLM 5.3 FlashMistral Medium 3.1Leader
LiveBench coding80.6%Not measuredOnly GLM 5.3 Flash measured
LMArena WebDev1607Not measuredOnly GLM 5.3 Flash measured
AA Coding Index71.520.5GLM 5.3 Flash
LiveCodeBench (Vals AI)80.5%44.8%GLM 5.3 Flash
SWE-bench Verified (Vals AI)92.0%Not measuredOnly GLM 5.3 Flash measured
Terminal-Bench 4 (Vals AI)37.4%Not measuredOnly GLM 5.3 Flash measured
Vibe Code Bench (Vals AI)30.8%Not measuredOnly GLM 5.3 Flash measured
Code migration (Vals AI)20.5%Not measuredOnly GLM 5.3 Flash measured
ProgramBench (Vals AI)0.0%Not measuredOnly GLM 5.3 Flash measured
IOI (Vals AI)52.5%Not measuredOnly GLM 5.3 Flash measured
Terminal-Bench 2.1 (Vals AI)62.9%Not measuredOnly GLM 5.3 Flash measured
Vibe Code Bench 1-100 (Vals AI)16.0%Not measuredOnly GLM 5.3 Flash measured
SkillsBench (Vals AI)40.2%Not measuredOnly GLM 5.3 Flash measured
CyberBench (Vals AI)67.9%Not measuredOnly GLM 5.3 Flash measured
LiveCodeBench (Artificial Analysis run)Not measured40.6%Only Mistral Medium 3.1 measured
SciCode51.6%32.4%GLM 5.3 Flash
Terminal-Bench Hard (Artificial Analysis run)Not measured10.6%Only Mistral Medium 3.1 measured
FrontierCode31.8%Not measuredOnly GLM 5.3 Flash measured
FrontierSWE18.1%Not measuredOnly GLM 5.3 Flash measured
ALE-Bench303.6210.2GLM 5.3 Flash
LMArena Text: coding15071433GLM 5.3 Flash
LMArena Text: software and IT15001436GLM 5.3 Flash
LMArena WebDev: React1624Not measuredOnly GLM 5.3 Flash measured
LMArena WebDev: HTML1577Not measuredOnly GLM 5.3 Flash measured
LMArena WebDev: from an image1578Not measuredOnly GLM 5.3 Flash measured
Neither model has a result on the other 14 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index10
Intelligence benchmarks for GLM 5.3 Flash and Mistral Medium 3.1
BenchmarkGLM 5.3 FlashMistral Medium 3.1Leader
AA Intelligence Index41.89.2GLM 5.3 Flash
Epoch Capabilities Index153.1Not measuredOnly GLM 5.3 Flash measured
Agentic workLike-for-likePublic boards, shown as published, kept out of the index10
Agentic work benchmarks for GLM 5.3 Flash and Mistral Medium 3.1
BenchmarkGLM 5.3 FlashMistral Medium 3.1Leader
AA Agentic Index50.91.9GLM 5.3 Flash
LiveBench research70.1%Not measuredOnly GLM 5.3 Flash measured
LiveBench browser84.0%Not measuredOnly GLM 5.3 Flash measured
LiveBench long agentic28.4%Not measuredOnly GLM 5.3 Flash measured
SREBench (Vals AI)0.8%Not measuredOnly GLM 5.3 Flash measured
Finance Agent (Vals AI)57.9%Not measuredOnly GLM 5.3 Flash measured
Tax Agent Bench (Vals AI)31.6%Not measuredOnly GLM 5.3 Flash measured
Legal Research Bench (Vals AI)45.2%Not measuredOnly GLM 5.3 Flash measured
Harvey's Legal Agent Benchmark (Vals AI)10.4%Not measuredOnly GLM 5.3 Flash measured
Excel Modeling Benchmark (Vals AI)55.9%Not measuredOnly GLM 5.3 Flash measured
Terminal-Bench-Science (Vals AI)2.9%Not measuredOnly GLM 5.3 Flash measured
τ²-Bench TelecomNot measured40.6%Only Mistral Medium 3.1 measured
APEX-Agents52.8%Not measuredOnly GLM 5.3 Flash measured
Neither model has a result on the other 28 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index80
Reasoning benchmarks for GLM 5.3 Flash and Mistral Medium 3.1
BenchmarkGLM 5.3 FlashMistral Medium 3.1Leader
GPQA Diamond86.4%Not measuredOnly GLM 5.3 Flash measured
LiveBench reasoning77.6%Not measuredOnly GLM 5.3 Flash measured
MMMU Pro (Vals AI)86.0%63.0%GLM 5.3 Flash
GPQA Diamond (Artificial Analysis run)91.2%58.8%GLM 5.3 Flash
Humanity's Last Exam (Artificial Analysis run)39.9%4.7%GLM 5.3 Flash
GPQA Diamond (Epoch AI run)90.2%Not measuredOnly GLM 5.3 Flash measured
ARC-AGI91.0%Not measuredOnly GLM 5.3 Flash measured
ARC-AGI-265.8%Not measuredOnly GLM 5.3 Flash measured
Chess puzzles21.0%Not measuredOnly GLM 5.3 Flash measured
Mystery game puzzles8.0%Not measuredOnly GLM 5.3 Flash measured
LMArena Text: hard prompts14901426GLM 5.3 Flash
LMArena Text: expert15111408GLM 5.3 Flash
LMArena Text: hard prompts in English14881435GLM 5.3 Flash
LMArena Vision: diagrams13171175GLM 5.3 Flash
LMArena Vision: homework13181165GLM 5.3 Flash
Neither model has a result on the other 7 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index20
Math benchmarks for GLM 5.3 Flash and Mistral Medium 3.1
BenchmarkGLM 5.3 FlashMistral Medium 3.1Leader
AIMENot measured42.3%Only Mistral Medium 3.1 measured
MATH 500 (Vals AI)Not measured87.0%Only Mistral Medium 3.1 measured
MGSM (Vals AI)Not measured90.9%Only Mistral Medium 3.1 measured
AA Math IndexNot measured38.3Only Mistral Medium 3.1 measured
AIME 2025 (Artificial Analysis run)Not measured38.3%Only Mistral Medium 3.1 measured
OTIS Mock AIME93.9%Not measuredOnly GLM 5.3 Flash measured
FrontierMath, tiers 1 to 355.8%Not measuredOnly GLM 5.3 Flash measured
FrontierMath, tier 417.1%Not measuredOnly GLM 5.3 Flash measured
ProofBench21.0%Not measuredOnly GLM 5.3 Flash measured
LMArena Text: math15031408GLM 5.3 Flash
LMArena Text: mathematical work14971412GLM 5.3 Flash
Neither model has a result on the other 2 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index70
Knowledge benchmarks for GLM 5.3 Flash and Mistral Medium 3.1
BenchmarkGLM 5.3 FlashMistral Medium 3.1Leader
MMLU Pro86.1%75.3%GLM 5.3 Flash
LegalBench (Vals AI)83.9%62.0%GLM 5.3 Flash
CorpFin (Vals AI)Not measured50.7%Only Mistral Medium 3.1 measured
TaxEval (Vals AI)75.6%70.3%GLM 5.3 Flash
MortgageTax (Vals AI)Not measured36.5%Only Mistral Medium 3.1 measured
MedQA (Vals AI)Not measured78.2%Only Mistral Medium 3.1 measured
MMLU Pro (Artificial Analysis run)Not measured68.3%Only Mistral Medium 3.1 measured
LMArena Text: science14841444GLM 5.3 Flash
LMArena Text: medicine and healthcare14751449GLM 5.3 Flash
LMArena Text: legal and government14731439GLM 5.3 Flash
LMArena Text: business and finance14601418GLM 5.3 Flash
Neither model has a result on the other 7 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index80
Web design benchmarks for GLM 5.3 Flash and Mistral Medium 3.1
BenchmarkGLM 5.3 FlashMistral Medium 3.1Leader
Design Arena: websites12721133GLM 5.3 Flash
Design Arena: UI components13161100GLM 5.3 Flash
Design Arena: game dev12781074GLM 5.3 Flash
Design Arena: data viz12611144GLM 5.3 Flash
Design Arena: 3D13161081GLM 5.3 Flash
Design Arena: all code categories12821120GLM 5.3 Flash
Design Arena: SVG1284993GLM 5.3 Flash
Design Arena: ASCII art1268997GLM 5.3 Flash
LiveBench design77.2%Not measuredOnly GLM 5.3 Flash measured
GeneralLike-for-likePublic boards, shown as published, kept out of the index240
General benchmarks for GLM 5.3 Flash and Mistral Medium 3.1
BenchmarkGLM 5.3 FlashMistral Medium 3.1Leader
Vals Index50.9%Not measuredOnly GLM 5.3 Flash measured
LiveBench data analysis76.4%Not measuredOnly GLM 5.3 Flash measured
MedScribe (Vals AI)88.9%Not measuredOnly GLM 5.3 Flash measured
IFBenchNot measured39.8%Only Mistral Medium 3.1 measured
Long context reasoning (AA-LCR)80.0%42.7%GLM 5.3 Flash
DTBenchNot measured67.5%Only Mistral Medium 3.1 measured
LMCANot measured19.1%Only Mistral Medium 3.1 measured
Surface Evolver Bench52.5%Not measuredOnly GLM 5.3 Flash measured
LMArena Text14711424GLM 5.3 Flash
LMArena Text: instruction following14781398GLM 5.3 Flash
LMArena Text: creative writing14411391GLM 5.3 Flash
LMArena Vision12941172GLM 5.3 Flash
LMArena Text: English14741438GLM 5.3 Flash
LMArena Text: non-English14621408GLM 5.3 Flash
LMArena Text: Chinese15311447GLM 5.3 Flash
LMArena Text: German14621432GLM 5.3 Flash
LMArena Text: Japanese14441379GLM 5.3 Flash
LMArena Text: Korean14361380GLM 5.3 Flash
LMArena Text: French14911460GLM 5.3 Flash
LMArena Text: Spanish14751433GLM 5.3 Flash
LMArena Text: Russian14651411GLM 5.3 Flash
LMArena Text: Polish14501430GLM 5.3 Flash
LMArena Text: multi-turn14691418GLM 5.3 Flash
LMArena Text: longer queries14811406GLM 5.3 Flash
LMArena Text: writing and language14551395GLM 5.3 Flash
LMArena Text: entertainment and media14401390GLM 5.3 Flash
LMArena Vision: English12951179GLM 5.3 Flash
LMArena Vision: Chinese13631190GLM 5.3 Flash
LMArena Vision: reading text12991175GLM 5.3 Flash
LMArena Vision: humor12791168GLM 5.3 Flash
LMArena Vision: captioningNot measured1145Only Mistral Medium 3.1 measured
LMArena Vision: recognizing thingsNot measured1147Only Mistral Medium 3.1 measured
LMArena Vision: creative writing12701200GLM 5.3 Flash
Neither model has a result on the other 13 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for GLM 5.3 Flash and Mistral Medium 3.1
BenchmarkGLM 5.3 FlashMistral Medium 3.1Leader
Neither model has a result on 5 boards here

What each workload costs

Three fixed token mixes at each model's listed price, so per-token rates become a bill.

Chat turn

1K input + 500 output tokens

GLM 5.3 Flash$0.0004Fits in one request
Mistral Medium 3.1$0.0014Fits in one request

GLM 5.3 Flash costs less

Repository review

50K input + 3K output tokens

GLM 5.3 Flash$0.0090Fits in one request
Mistral Medium 3.1$0.026Fits in one request

GLM 5.3 Flash costs less

Agent loop

200K input + 10K output tokens

GLM 5.3 Flash$0.035Fits in one request
Mistral Medium 3.1$0.100Exceeds the context window

GLM 5.3 Flash costs less

Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.

Specification differences

The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.

Specifications of GLM 5.3 Flash and Mistral Medium 3.1
SpecificationZ.ai GLM 5.3 FlashMistral Medium 3.1
MakerZ.aiMistral AI
WeightsOpen weightsNo public weights listed
ReleasedAugust 26, 2026August 13, 2025
Context window1.05M131K
Input $/Mtok$0.15$0.40
Output $/Mtok$0.50$2.00
Coding index57.7Not benchmarked
Independent measurements behind it60
Cost per solved task$0.02Not computable
SourceOpenRouter listingOpenRouter listing

Questions

Is GLM 5.3 Flash better than Mistral Medium 3.1 for coding?

Only GLM 5.3 Flash has a coding score, 57.7 on the Vibe Coding Index; Mistral Medium 3.1 has none, so the two cannot be ranked on coding. Compare them on price, context and the boards below.

Which is cheaper, GLM 5.3 Flash or Mistral Medium 3.1?

GLM 5.3 Flash costs $0.15 per million input tokens and $0.50 per million output tokens; Mistral Medium 3.1 costs $0.40 and $2.00. Cost per solved task is known for GLM 5.3 Flash only.

Which has the bigger context window, GLM 5.3 Flash or Mistral Medium 3.1?

GLM 5.3 Flash, with 1.05M tokens against 131K.

How many benchmarks is the GLM 5.3 Flash vs Mistral Medium 3.1 comparison based on?

57 benchmarks have a result for both models as of October 21, 2026. GLM 5.3 Flash's coding index rests on 6 independent benchmarks and Mistral Medium 3.1's on 0. Where only one model has a result, the page says so instead of naming a winner.

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