Claude Opus 4.5 vs MiniMax M2.1

Claude Opus 4.5 leads MiniMax M2.1 on the Artificial Analysis Intelligence Index, 29.1 to 20.9, and MiniMax M2.1 costs 20.8x less per output token ($1.20 vs $25.00 per million). Updated October 22, 2026; 32 benchmarks have a result for both.

Replace Claude Opus 4.5 Replace MiniMax M2.1

Claude Opus 4.5Anthropic

Coding: 44.0
Overall: 55.7
Output $/M: $25.00

MiniMax M2.1MiniMax

Coding: No data
Overall: No data
Output $/M: $1.20

vs boards won of 32 shared

Claude Opus 4.5 or MiniMax M2.1: which to pick

Only Claude Opus 4.5 has a coding score, 44.0 on the Vibe Coding Index; MiniMax M2.1 has none, so the two cannot be ranked on coding.

Pick MiniMax M2.1 for output tokens 20.8x cheaper ($1.20 vs $25.00 per million) and a lower cost per solved task ($0.59 against $1.37).

Model AClaude Opus 4.5Anthropic44.0/1003 independent benchmarks$1.37 per solved task Model BMiniMax M2.1MiniMaxNot benchmarked1 independent benchmark$0.59 per solved task

32802

Shared results: 32
Claude Opus 4.5 only: 80
MiniMax M2.1 only: 2
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.

Coding
Vibe Coding Index, six public coding benchmarks
No call
Only Claude Opus 4.5 has a coding score, so no call is made.
One side not measured
Intelligence
AA Intelligence Index
Claude Opus 4.5
Claude Opus 4.5 leads, 29.1 against 20.9.
Same board, both measured
Reasoning
GPQA Diamond
Claude Opus 4.5
Claude Opus 4.5 leads, 85.9% against 78.5%.
Same board, both measured
Math
AIME
Claude Opus 4.5
Claude Opus 4.5 leads, 95.4% against 77.9%.
Same board, both measured
Knowledge
MMLU Pro
Claude Opus 4.5
Claude Opus 4.5 leads, 87.3% against 87.0%.
Same board, both measured
Web design
Design Arena: websites
Claude Opus 4.5
Claude Opus 4.5 leads, 1247 against 1201.
Same board, both measured
Long documents
Listed context window
MiniMax M2.1
MiniMax M2.1 takes 205K tokens against 200K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
MiniMax M2.1
Claude Opus 4.5 $0.018, MiniMax M2.1 $0.0009 per turn.
List prices
Cost per solved task
One SWE-bench Verified task, solved
MiniMax M2.1
Claude Opus 4.5 $1.37, MiniMax M2.1 $0.59.
Published attempt cost and pass rate

At a glance

Coding index: Claude Opus 4.5 44.0 from 3 benchmarks, MiniMax M2.1 not benchmarked.
Widest category: Coding, 10.9 points apart on average over 5 shared benchmarks.
Widest single gap: Terminal-Bench: Claude Opus 4.5 63.1% against MiniMax M2.1 36.6%, 26.5 points apart on a 0 to 100 scale.
Output price: Claude Opus 4.5 $25.00 against MiniMax M2.1 $1.20 per million output tokens, 20.8x apart.
Context window: Claude Opus 4.5 takes 200K tokens, MiniMax M2.1 205K.

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
Category	Claude Opus 4.5	MiniMax M2.1
Coding	5	0
Intelligence	1	0
Agentic work	1	0
Reasoning	3	0
Math	4	0
Knowledge	8	0
Web design	7	0
General	2	1
All shared boards	31	1

CodingLike-for-likeSix of these boards feed the Vibe Coding Index50

Coding benchmarks for Claude Opus 4.5 and MiniMax M2.1
Benchmark	Claude Opus 4.5	MiniMax M2.1	Leader
SWE-bench Verified	79.2%	Not measured	Only Claude Opus 4.5 measured
SWE-bench (full test set)	52.6%	Not measured	Only Claude Opus 4.5 measured
SWE-bench Multilingual	70.7%	Not measured	Only Claude Opus 4.5 measured
LMArena WebDev	1494	Not measured	Only Claude Opus 4.5 measured
LiveCodeBench (Vals AI)	83.7%	81.8%	Claude Opus 4.5
SWE-bench Verified (Vals AI)	76.4%	74.8%	Claude Opus 4.5
Vibe Code Bench (Vals AI)	20.6%	Not measured	Only Claude Opus 4.5 measured
LiveCodeBench (Artificial Analysis run)	87.1%	81.0%	Claude Opus 4.5
Terminal-Bench Hard (Artificial Analysis run)	47.0%	28.8%	Claude Opus 4.5
Terminal-Bench	63.1%	36.6%	Claude Opus 4.5
GSO-Bench	26.5%	Not measured	Only Claude Opus 4.5 measured
WeirdML	63.7%	Not measured	Only Claude Opus 4.5 measured
Cybench	82.0%	Not measured	Only Claude Opus 4.5 measured
ALE-Bench	Not measured	623.8	Only MiniMax M2.1 measured
LMArena Text: coding	1503	Not measured	Only Claude Opus 4.5 measured
LMArena Text: software and IT	1483	Not measured	Only Claude Opus 4.5 measured
LMArena WebDev: React	1478	Not measured	Only Claude Opus 4.5 measured
LMArena WebDev: HTML	1510	Not measured	Only Claude Opus 4.5 measured
Neither model has a result on the other 25 boards here

IntelligenceLike-for-likePublic boards, shown as published, kept out of the index10

Intelligence benchmarks for Claude Opus 4.5 and MiniMax M2.1
Benchmark	Claude Opus 4.5	MiniMax M2.1	Leader
AA Intelligence Index	29.1	20.9	Claude Opus 4.5
Epoch Capabilities Index	150.1	Not measured	Only Claude Opus 4.5 measured

Agentic workLike-for-likePublic boards, shown as published, kept out of the index10

Agentic work benchmarks for Claude Opus 4.5 and MiniMax M2.1
Benchmark	Claude Opus 4.5	MiniMax M2.1	Leader
Design Arena: agents building web apps	1159	Not measured	Only Claude Opus 4.5 measured
Design Arena: agents building full-stack apps	1156	Not measured	Only Claude Opus 4.5 measured
Design Arena: agents building mobile apps	1188	Not measured	Only Claude Opus 4.5 measured
Design Arena: agents building Android apps	1176	Not measured	Only Claude Opus 4.5 measured
τ²-Bench Telecom	89.5%	85.4%	Claude Opus 4.5
METR time horizons	75.0%	Not measured	Only Claude Opus 4.5 measured
Remote Labor Index	3.8%	Not measured	Only Claude Opus 4.5 measured
GDPval	45.5%	Not measured	Only Claude Opus 4.5 measured
BALROG	43.5%	Not measured	Only Claude Opus 4.5 measured
DeepResearch Bench	54.8%	Not measured	Only Claude Opus 4.5 measured
OSWorld	66.3%	Not measured	Only Claude Opus 4.5 measured
Vending-Bench 2	$4,967	Not measured	Only Claude Opus 4.5 measured
Berkeley Function Calling Leaderboard (BFCL)	77.5%	Not measured	Only Claude Opus 4.5 measured
MCP Atlas	69.8%	Not measured	Only Claude Opus 4.5 measured
Neither model has a result on the other 28 boards here

ReasoningLike-for-likePublic boards, shown as published, kept out of the index30

Reasoning benchmarks for Claude Opus 4.5 and MiniMax M2.1
Benchmark	Claude Opus 4.5	MiniMax M2.1	Leader
GPQA Diamond	85.9%	78.5%	Claude Opus 4.5
MMMU Pro (Vals AI)	83.0%	Not measured	Only Claude Opus 4.5 measured
GPQA Diamond (Artificial Analysis run)	86.6%	83.0%	Claude Opus 4.5
Humanity's Last Exam (Artificial Analysis run)	30.1%	23.2%	Claude Opus 4.5
GPQA Diamond (Epoch AI run)	86.0%	Not measured	Only Claude Opus 4.5 measured
ARC-AGI	80.0%	Not measured	Only Claude Opus 4.5 measured
ARC-AGI-2	37.6%	Not measured	Only Claude Opus 4.5 measured
SimpleBench	62.0%	Not measured	Only Claude Opus 4.5 measured
Chess puzzles	14.0%	Not measured	Only Claude Opus 4.5 measured
Mystery game puzzles	22.0%	Not measured	Only Claude Opus 4.5 measured
EBR-bench	14.3%	Not measured	Only Claude Opus 4.5 measured
VPCT	40.0%	Not measured	Only Claude Opus 4.5 measured
LMArena Text: hard prompts	1476	Not measured	Only Claude Opus 4.5 measured
LMArena Text: expert	1487	Not measured	Only Claude Opus 4.5 measured
LMArena Text: hard prompts in English	1482	Not measured	Only Claude Opus 4.5 measured
Kagi LLM Benchmark	80.2%	Not measured	Only Claude Opus 4.5 measured
Neither model has a result on the other 7 boards here

MathLike-for-likePublic boards, shown as published, kept out of the index40

Math benchmarks for Claude Opus 4.5 and MiniMax M2.1
Benchmark	Claude Opus 4.5	MiniMax M2.1	Leader
AIME	95.4%	77.9%	Claude Opus 4.5
MATH 500 (Vals AI)	Not measured	89.0%	Only MiniMax M2.1 measured
MGSM (Vals AI)	95.2%	87.8%	Claude Opus 4.5
AA Math Index	91.3	82.7	Claude Opus 4.5
AIME 2025 (Artificial Analysis run)	91.3%	82.7%	Claude Opus 4.5
OTIS Mock AIME	86.1%	Not measured	Only Claude Opus 4.5 measured
FrontierMath, tiers 1 to 3	34.4%	Not measured	Only Claude Opus 4.5 measured
FrontierMath, tier 4	4.9%	Not measured	Only Claude Opus 4.5 measured
ProofBench	36.0%	Not measured	Only Claude Opus 4.5 measured
LMArena Text: math	1463	Not measured	Only Claude Opus 4.5 measured
LMArena Text: mathematical work	1468	Not measured	Only Claude Opus 4.5 measured
Neither model has a result on the other 3 boards here

KnowledgeLike-for-likePublic boards, shown as published, kept out of the index80

Knowledge benchmarks for Claude Opus 4.5 and MiniMax M2.1
Benchmark	Claude Opus 4.5	MiniMax M2.1	Leader
MMLU Pro	87.3%	87.0%	Claude Opus 4.5
LegalBench (Vals AI)	84.6%	75.5%	Claude Opus 4.5
CaseLaw (Vals AI)	62.6%	55.8%	Claude Opus 4.5
CorpFin (Vals AI)	65.1%	58.9%	Claude Opus 4.5
TaxEval (Vals AI)	74.9%	66.3%	Claude Opus 4.5
MortgageTax (Vals AI)	68.7%	Not measured	Only Claude Opus 4.5 measured
MedQA (Vals AI)	95.9%	91.2%	Claude Opus 4.5
MedCode (Vals AI)	49.2%	34.1%	Claude Opus 4.5
MMLU Pro (Artificial Analysis run)	89.5%	87.5%	Claude Opus 4.5
SimpleQA Verified	45.7%	Not measured	Only Claude Opus 4.5 measured
GeoBench	75.0%	Not measured	Only Claude Opus 4.5 measured
LMArena Text: science	1454	Not measured	Only Claude Opus 4.5 measured
LMArena Text: medicine and healthcare	1444	Not measured	Only Claude Opus 4.5 measured
LMArena Text: legal and government	1459	Not measured	Only Claude Opus 4.5 measured
LMArena Text: business and finance	1448	Not measured	Only Claude Opus 4.5 measured
FACTS Benchmark Suite	43.9%	Not measured	Only Claude Opus 4.5 measured
PRBench Finance	46.2%	Not measured	Only Claude Opus 4.5 measured
PRBench Legal	44.2%	Not measured	Only Claude Opus 4.5 measured
Neither model has a result on the other 2 boards here

Web designLike-for-likePublic boards, shown as published, kept out of the index70

Web design benchmarks for Claude Opus 4.5 and MiniMax M2.1
Benchmark	Claude Opus 4.5	MiniMax M2.1	Leader
Design Arena: websites	1247	1201	Claude Opus 4.5
Design Arena: UI components	1236	1220	Claude Opus 4.5
Design Arena: game dev	1228	1134	Claude Opus 4.5
Design Arena: data viz	1243	1206	Claude Opus 4.5
Design Arena: 3D	1213	1164	Claude Opus 4.5
Design Arena: all code categories	1241	1190	Claude Opus 4.5
Design Arena: SVG	1180	1131	Claude Opus 4.5
Design Arena: ASCII art	1190	Not measured	Only Claude Opus 4.5 measured
Neither model has a result on the other 1 board here

GeneralLike-for-likePublic boards, shown as published, kept out of the index21

General benchmarks for Claude Opus 4.5 and MiniMax M2.1
Benchmark	Claude Opus 4.5	MiniMax M2.1	Leader
SAGE (Vals AI)	52.1%	Not measured	Only Claude Opus 4.5 measured
MedScribe (Vals AI)	85.3%	80.8%	Claude Opus 4.5
IFBench	58.0%	69.9%	MiniMax M2.1
Long context reasoning (AA-LCR)	77.3%	67.7%	Claude Opus 4.5
DTBench	89.9%	Not measured	Only Claude Opus 4.5 measured
LMCA	44.5%	Not measured	Only Claude Opus 4.5 measured
CL-bench	21.1%	Not measured	Only Claude Opus 4.5 measured
Furniture assembly	28.3%	Not measured	Only Claude Opus 4.5 measured
LMArena Text	1451	Not measured	Only Claude Opus 4.5 measured
LMArena Text: instruction following	1478	Not measured	Only Claude Opus 4.5 measured
LMArena Text: creative writing	1445	Not measured	Only Claude Opus 4.5 measured
LMArena Text: English	1461	Not measured	Only Claude Opus 4.5 measured
LMArena Text: non-English	1438	Not measured	Only Claude Opus 4.5 measured
LMArena Text: Chinese	1470	Not measured	Only Claude Opus 4.5 measured
LMArena Text: German	1449	Not measured	Only Claude Opus 4.5 measured
LMArena Text: Japanese	1417	Not measured	Only Claude Opus 4.5 measured
LMArena Text: Korean	1424	Not measured	Only Claude Opus 4.5 measured
LMArena Text: French	1471	Not measured	Only Claude Opus 4.5 measured
LMArena Text: Spanish	1457	Not measured	Only Claude Opus 4.5 measured
LMArena Text: Russian	1447	Not measured	Only Claude Opus 4.5 measured
LMArena Text: Polish	1439	Not measured	Only Claude Opus 4.5 measured
LMArena Text: multi-turn	1466	Not measured	Only Claude Opus 4.5 measured
LMArena Text: longer queries	1479	Not measured	Only Claude Opus 4.5 measured
LMArena Text: writing and language	1452	Not measured	Only Claude Opus 4.5 measured
LMArena Text: entertainment and media	1434	Not measured	Only Claude Opus 4.5 measured
LMArena Document	1462	Not measured	Only Claude Opus 4.5 measured
MultiChallenge	59.0%	Not measured	Only Claude Opus 4.5 measured
Neither model has a result on the other 21 boards here

Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared

Image generation benchmarks for Claude Opus 4.5 and MiniMax M2.1
Benchmark	Claude Opus 4.5	MiniMax M2.1	Leader
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

Claude Opus 4.5$0.018Fits in one request

MiniMax M2.1$0.0009Fits in one request

MiniMax M2.1 costs less

Repository review

50K input + 3K output tokens

Claude Opus 4.5$0.325Fits in one request

MiniMax M2.1$0.019Fits in one request

MiniMax M2.1 costs less

Agent loop

200K input + 10K output tokens

Claude Opus 4.5$1.25Exceeds the context window

MiniMax M2.1$0.072Exceeds the context window

MiniMax M2.1 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 Claude Opus 4.5 and MiniMax M2.1
Specification	Anthropic Claude Opus 4.5	MiniMax M2.1
Maker	Anthropic	MiniMax
Weights	No public weights listed	Open weights
Released	November 24, 2025	December 23, 2025
Context window	200K	205K
Input $/Mtok	$5.00	$0.30
Output $/Mtok	$25.00	$1.20
Coding index	44.0	Not benchmarked
Independent measurements behind it	3	1
Cost per solved task	$1.37	$0.59
Source	OpenRouter listing	OpenRouter listing

Questions

Is Claude Opus 4.5 better than MiniMax M2.1 for coding?

Only Claude Opus 4.5 has a coding score, 44.0 on the Vibe Coding Index; MiniMax M2.1 has none, so the two cannot be ranked on coding. Pick MiniMax M2.1 for output tokens 20.8x cheaper ($1.20 vs $25.00 per million) and a lower cost per solved task ($0.59 against $1.37).

Which is cheaper, Claude Opus 4.5 or MiniMax M2.1?

Claude Opus 4.5 costs $5.00 per million input tokens and $25.00 per million output tokens; MiniMax M2.1 costs $0.30 and $1.20. Per solved SWE-bench Verified task, Claude Opus 4.5 costs $1.37 and MiniMax M2.1 $0.59.

Which has the bigger context window, Claude Opus 4.5 or MiniMax M2.1?

MiniMax M2.1, with 205K tokens against 200K.

How many benchmarks is the Claude Opus 4.5 vs MiniMax M2.1 comparison based on?

32 benchmarks have a result for both models as of October 22, 2026. Claude Opus 4.5's coding index rests on 3 independent benchmarks and MiniMax M2.1's on 1. Where only one model has a result, the page says so instead of naming a winner.

Claude Opus 4.5 or MiniMax M2.1: which to pick

Which one for your work

Coding

Intelligence

Reasoning

Math

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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