Grok 4.3 vs Qwen3 Coder Flash

Qwen3 Coder Flash costs 2.6x less per output token than Grok 4.3 ($0.975 vs $2.50 per million). Updated October 21, 2026; no benchmark has tested both models yet.

Replace Grok 4.3 Replace Qwen3 Coder Flash

Grok 4.3xAI

Coding: 37.4
Overall: 53.1
Output $/M: $2.50

Qwen3 Coder FlashQwen

Coding: No data
Overall: No data
Output $/M: $0.975

vs $2.50 vs $0.975 per 1M output tokens. Qwen3 Coder Flash is 2.6x cheaper.

Grok 4.3 or Qwen3 Coder Flash: which to pick

Only Grok 4.3 has a coding score, 37.4 on the Vibe Coding Index; Qwen3 Coder Flash has none, so the two cannot be ranked on coding.

Pick Qwen3 Coder Flash for output tokens 2.6x cheaper ($0.975 vs $2.50 per million).

Model AGrok 4.3xAI37.4/1003 independent benchmarks$0.31 per solved task Model BQwen3 Coder FlashQwenNot benchmarkedNo coding benchmarkNo cost per solved task

No benchmark has tested both yet. Grok 4.3 has results on LMArena WebDev, AA Coding Index and LiveCodeBench (Vals AI); Qwen3 Coder Flash has none yet. Compare them on price and context instead.

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.

Coding
Vibe Coding Index, six public coding benchmarks
No call
Only Grok 4.3 has a coding score, so no call is made.
One side not measured
Intelligence
AA Intelligence Index
No call
Only Grok 4.3 has a AA Intelligence Index result, 24.9.
Directional only
Agentic work
AA Agentic Index
No call
Only Grok 4.3 has a AA Agentic Index result, 15.5.
Directional only
Reasoning
GPQA Diamond
No call
Only Grok 4.3 has a GPQA Diamond result, 91.4%.
Directional only
Knowledge
MMLU Pro
No call
Only Grok 4.3 has a MMLU Pro result, 85.8%.
Directional only
Web design
Design Arena: websites
No call
Only Grok 4.3 has a Design Arena: websites result, 1196.
Directional only
Long documents
Listed context window
No call
Both take 1M tokens.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Qwen3 Coder Flash
Grok 4.3 $0.0025, Qwen3 Coder Flash $0.0007 per turn.
List prices
Cost per solved task
One SWE-bench Verified task, solved
No call
Only Grok 4.3 has the number, $0.31.
Directional only

At a glance

Coding index: Grok 4.3 37.4 from 3 benchmarks, Qwen3 Coder Flash not benchmarked.
Widest category: None yet: no category has been tested on both models.
Widest single gap: None yet: no benchmark has tested both models.
Output price: Grok 4.3 $2.50 against Qwen3 Coder Flash $0.975 per million output tokens, 2.6x apart.
Context window: Both take 1M tokens.

Benchmark by benchmark

Every board either model has a result on, a category to a fold; bars are each result on a 0 to 100 scale. Only one model is measured on each, so no row names a leader.

CodingDirectional onlySix of these boards feed the Vibe Coding Index18 boards measured

Coding benchmarks for Grok 4.3 and Qwen3 Coder Flash
Benchmark	Grok 4.3	Qwen3 Coder Flash	Leader
LMArena WebDev	1358	Not measured	Only Grok 4.3 measured
AA Coding Index	42.2	Not measured	Only Grok 4.3 measured
LiveCodeBench (Vals AI)	84.5%	Not measured	Only Grok 4.3 measured
SWE-bench Verified (Vals AI)	71.4%	Not measured	Only Grok 4.3 measured
Vibe Code Bench (Vals AI)	19.4%	Not measured	Only Grok 4.3 measured
Code migration (Vals AI)	6.8%	Not measured	Only Grok 4.3 measured
ProgramBench (Vals AI)	0.0%	Not measured	Only Grok 4.3 measured
Terminal-Bench 2.1 (Vals AI)	42.0%	Not measured	Only Grok 4.3 measured
SkillsBench (Vals AI)	40.6%	Not measured	Only Grok 4.3 measured
SciCode	48.3%	Not measured	Only Grok 4.3 measured
Terminal-Bench Hard (Artificial Analysis run)	37.9%	Not measured	Only Grok 4.3 measured
WeirdML	49.9%	Not measured	Only Grok 4.3 measured
ALE-Bench	944.2	Not measured	Only Grok 4.3 measured
LMArena Text: coding	1415	Not measured	Only Grok 4.3 measured
LMArena Text: software and IT	1416	Not measured	Only Grok 4.3 measured
LMArena WebDev: React	1353	Not measured	Only Grok 4.3 measured
LMArena WebDev: HTML	1367	Not measured	Only Grok 4.3 measured
LMArena WebDev: from an image	1375	Not measured	Only Grok 4.3 measured
Neither model has a result on the other 21 boards here

IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index1 board measured

Intelligence benchmarks for Grok 4.3 and Qwen3 Coder Flash
Benchmark	Grok 4.3	Qwen3 Coder Flash	Leader
AA Intelligence Index	24.9	Not measured	Only Grok 4.3 measured
Neither model has a result on the other 1 board here

Agentic workDirectional onlyPublic boards, shown as published, kept out of the index16 boards measured

Agentic work benchmarks for Grok 4.3 and Qwen3 Coder Flash
Benchmark	Grok 4.3	Qwen3 Coder Flash	Leader
AA Agentic Index	15.5	Not measured	Only Grok 4.3 measured
Design Arena: agents building web apps	1126	Not measured	Only Grok 4.3 measured
Design Arena: agents building full-stack apps	1006	Not measured	Only Grok 4.3 measured
Design Arena: agents building mobile apps	1059	Not measured	Only Grok 4.3 measured
Design Arena: agents building Android apps	961	Not measured	Only Grok 4.3 measured
Design Arena: agents building Godot games	914	Not measured	Only Grok 4.3 measured
Design Arena: agents building games	1007	Not measured	Only Grok 4.3 measured
Design Arena: HTML slides	1008	Not measured	Only Grok 4.3 measured
Design Arena: PowerPoint slides	1013	Not measured	Only Grok 4.3 measured
Finance Agent (Vals AI)	37.7%	Not measured	Only Grok 4.3 measured
Tax Agent Bench (Vals AI)	6.2%	Not measured	Only Grok 4.3 measured
Legal Research Bench (Vals AI)	15.4%	Not measured	Only Grok 4.3 measured
Excel Modeling Benchmark (Vals AI)	18.4%	Not measured	Only Grok 4.3 measured
τ²-Bench Telecom	97.7%	Not measured	Only Grok 4.3 measured
Vending-Bench 2	$35	Not measured	Only Grok 4.3 measured
LMArena Search	1166	Not measured	Only Grok 4.3 measured
Neither model has a result on the other 25 boards here

ReasoningDirectional onlyPublic boards, shown as published, kept out of the index11 boards measured

Reasoning benchmarks for Grok 4.3 and Qwen3 Coder Flash
Benchmark	Grok 4.3	Qwen3 Coder Flash	Leader
GPQA Diamond	91.4%	Not measured	Only Grok 4.3 measured
MMMU Pro (Vals AI)	83.1%	Not measured	Only Grok 4.3 measured
GPQA Diamond (Artificial Analysis run)	90.1%	Not measured	Only Grok 4.3 measured
Humanity's Last Exam (Artificial Analysis run)	37.2%	Not measured	Only Grok 4.3 measured
GPQA Diamond (Epoch AI run)	88.8%	Not measured	Only Grok 4.3 measured
Chess puzzles	18.0%	Not measured	Only Grok 4.3 measured
LMArena Text: hard prompts	1396	Not measured	Only Grok 4.3 measured
LMArena Text: expert	1384	Not measured	Only Grok 4.3 measured
LMArena Text: hard prompts in English	1402	Not measured	Only Grok 4.3 measured
LMArena Vision: diagrams	1241	Not measured	Only Grok 4.3 measured
LMArena Vision: homework	1241	Not measured	Only Grok 4.3 measured
Neither model has a result on the other 11 boards here

MathDirectional onlyPublic boards, shown as published, kept out of the index6 boards measured

Math benchmarks for Grok 4.3 and Qwen3 Coder Flash
Benchmark	Grok 4.3	Qwen3 Coder Flash	Leader
OTIS Mock AIME	93.3%	Not measured	Only Grok 4.3 measured
FrontierMath, tiers 1 to 3	42.8%	Not measured	Only Grok 4.3 measured
FrontierMath, tier 4	14.6%	Not measured	Only Grok 4.3 measured
ProofBench	11.0%	Not measured	Only Grok 4.3 measured
LMArena Text: math	1387	Not measured	Only Grok 4.3 measured
LMArena Text: mathematical work	1396	Not measured	Only Grok 4.3 measured
Neither model has a result on the other 7 boards here

KnowledgeDirectional onlyPublic boards, shown as published, kept out of the index12 boards measured

Knowledge benchmarks for Grok 4.3 and Qwen3 Coder Flash
Benchmark	Grok 4.3	Qwen3 Coder Flash	Leader
MMLU Pro	85.8%	Not measured	Only Grok 4.3 measured
LegalBench (Vals AI)	84.5%	Not measured	Only Grok 4.3 measured
CaseLaw (Vals AI)	79.3%	Not measured	Only Grok 4.3 measured
CorpFin (Vals AI)	68.5%	Not measured	Only Grok 4.3 measured
TaxEval (Vals AI)	70.8%	Not measured	Only Grok 4.3 measured
MortgageTax (Vals AI)	48.3%	Not measured	Only Grok 4.3 measured
MedCode (Vals AI)	38.1%	Not measured	Only Grok 4.3 measured
SimpleQA Verified	33.2%	Not measured	Only Grok 4.3 measured
LMArena Text: science	1399	Not measured	Only Grok 4.3 measured
LMArena Text: medicine and healthcare	1384	Not measured	Only Grok 4.3 measured
LMArena Text: legal and government	1386	Not measured	Only Grok 4.3 measured
LMArena Text: business and finance	1381	Not measured	Only Grok 4.3 measured
Neither model has a result on the other 6 boards here

Web designDirectional onlyPublic boards, shown as published, kept out of the index8 boards measured

Web design benchmarks for Grok 4.3 and Qwen3 Coder Flash
Benchmark	Grok 4.3	Qwen3 Coder Flash	Leader
Design Arena: websites	1196	Not measured	Only Grok 4.3 measured
Design Arena: UI components	1192	Not measured	Only Grok 4.3 measured
Design Arena: game dev	1174	Not measured	Only Grok 4.3 measured
Design Arena: data viz	1179	Not measured	Only Grok 4.3 measured
Design Arena: 3D	1125	Not measured	Only Grok 4.3 measured
Design Arena: all code categories	1187	Not measured	Only Grok 4.3 measured
Design Arena: SVG	1081	Not measured	Only Grok 4.3 measured
Design Arena: ASCII art	1125	Not measured	Only Grok 4.3 measured
Neither model has a result on the other 1 board here

GeneralDirectional onlyPublic boards, shown as published, kept out of the index32 boards measured

General benchmarks for Grok 4.3 and Qwen3 Coder Flash
Benchmark	Grok 4.3	Qwen3 Coder Flash	Leader
Public Benefits Bench (Vals AI)	51.7%	Not measured	Only Grok 4.3 measured
SAGE (Vals AI)	19.7%	Not measured	Only Grok 4.3 measured
MedScribe (Vals AI)	74.4%	Not measured	Only Grok 4.3 measured
Vals Multimodal Index	43.3%	Not measured	Only Grok 4.3 measured
IFBench	83.3%	Not measured	Only Grok 4.3 measured
Long context reasoning (AA-LCR)	75.0%	Not measured	Only Grok 4.3 measured
DTBench	90.7%	Not measured	Only Grok 4.3 measured
LMCA	38.3%	Not measured	Only Grok 4.3 measured
LMArena Text	1397	Not measured	Only Grok 4.3 measured
LMArena Text: instruction following	1366	Not measured	Only Grok 4.3 measured
LMArena Text: creative writing	1380	Not measured	Only Grok 4.3 measured
LMArena Vision	1229	Not measured	Only Grok 4.3 measured
LMArena Text: English	1404	Not measured	Only Grok 4.3 measured
LMArena Text: non-English	1385	Not measured	Only Grok 4.3 measured
LMArena Text: Chinese	1422	Not measured	Only Grok 4.3 measured
LMArena Text: German	1395	Not measured	Only Grok 4.3 measured
LMArena Text: Japanese	1379	Not measured	Only Grok 4.3 measured
LMArena Text: Korean	1354	Not measured	Only Grok 4.3 measured
LMArena Text: French	1411	Not measured	Only Grok 4.3 measured
LMArena Text: Spanish	1399	Not measured	Only Grok 4.3 measured
LMArena Text: Russian	1399	Not measured	Only Grok 4.3 measured
LMArena Text: Polish	1398	Not measured	Only Grok 4.3 measured
LMArena Text: multi-turn	1406	Not measured	Only Grok 4.3 measured
LMArena Text: longer queries	1393	Not measured	Only Grok 4.3 measured
LMArena Text: writing and language	1385	Not measured	Only Grok 4.3 measured
LMArena Text: entertainment and media	1370	Not measured	Only Grok 4.3 measured
LMArena Vision: English	1235	Not measured	Only Grok 4.3 measured
LMArena Vision: Chinese	1257	Not measured	Only Grok 4.3 measured
LMArena Vision: reading text	1235	Not measured	Only Grok 4.3 measured
LMArena Vision: humor	1222	Not measured	Only Grok 4.3 measured
LMArena Vision: recognizing things	1217	Not measured	Only Grok 4.3 measured
LMArena Vision: creative writing	1237	Not measured	Only Grok 4.3 measured
Neither model has a result on the other 14 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

Grok 4.3$0.0025Fits in one request

Qwen3 Coder Flash$0.0007Fits in one request

Qwen3 Coder Flash costs less

Repository review

50K input + 3K output tokens

Grok 4.3$0.070Fits in one request

Qwen3 Coder Flash$0.013Fits in one request

Qwen3 Coder Flash costs less

Agent loop

200K input + 10K output tokens

Grok 4.3$0.275Fits in one request

Qwen3 Coder Flash$0.049Fits in one request

Qwen3 Coder 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 Grok 4.3 and Qwen3 Coder Flash
Specification	SpaceXAI Grok 4.3	Qwen3 Coder Flash
Maker	xAI	Qwen
Weights	No public weights listed	No public weights listed
Released	April 30, 2026	September 17, 2025
Context window	1M	1M
Input $/Mtok	$1.25	$0.195
Output $/Mtok	$2.50	$0.975
Coding index	37.4	Not benchmarked
Independent measurements behind it	3	0
Cost per solved task	$0.31	Not computable
Source	OpenRouter listing	OpenRouter listing

Questions

Is Grok 4.3 better than Qwen3 Coder Flash for coding?

Only Grok 4.3 has a coding score, 37.4 on the Vibe Coding Index; Qwen3 Coder Flash has none, so the two cannot be ranked on coding. Pick Qwen3 Coder Flash for output tokens 2.6x cheaper ($0.975 vs $2.50 per million).

Which is cheaper, Grok 4.3 or Qwen3 Coder Flash?

Grok 4.3 costs $1.25 per million input tokens and $2.50 per million output tokens; Qwen3 Coder Flash costs $0.195 and $0.975. Cost per solved task is known for Grok 4.3 only.

Which has the bigger context window, Grok 4.3 or Qwen3 Coder Flash?

Neither: both take 1M tokens.

Has any benchmark tested both Grok 4.3 and Qwen3 Coder Flash?

No benchmark has tested both yet. Grok 4.3 has results on LMArena WebDev, AA Coding Index and LiveCodeBench (Vals AI); Qwen3 Coder Flash has none yet. Compare them on price and context instead. Data as of October 21, 2026.

Grok 4.3 or Qwen3 Coder Flash: which to pick

Which one for your work

Coding

Intelligence

Agentic work

Reasoning

Knowledge

Web design

Long documents

Everyday cost

Cost per solved task

At a glance

Benchmark by benchmark

What each workload costs

Chat turn

Repository review

Agent loop

Specification differences

Questions

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