Claude Opus 4.5 vs GPT-4o-mini (2024-07-18)

GPT-4o-mini (2024-07-18) costs 41.7x less per output token than Claude Opus 4.5 ($0.60 vs $25.00 per million). Updated October 22, 2026; 39 benchmarks have a result for both.

Replace Claude Opus 4.5 Replace GPT-4o-mini (2024-07-18)

Claude Opus 4.5Anthropic

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

GPT-4o-mini (2024-07-18)OpenAI

Coding: No data
Overall: No data
Output $/M: $0.60

vs boards won of 39 shared

Claude Opus 4.5 or GPT-4o-mini (2024-07-18): which to pick

Only Claude Opus 4.5 has a coding score, 44.0 on the Vibe Coding Index; GPT-4o-mini (2024-07-18) has none, so the two cannot be ranked on coding.

Pick GPT-4o-mini (2024-07-18) for output tokens 41.7x cheaper ($0.60 vs $25.00 per million).

Model AClaude Opus 4.5Anthropic44.0/1003 independent benchmarks$1.37 per solved task Model BGPT-4o-mini (2024-07-18)OpenAINot benchmarkedNo coding benchmarkNo cost per solved task

39737

Shared results: 39
Claude Opus 4.5 only: 73
GPT-4o-mini (2024-07-18) only: 7
Like-for-like categories: 6 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
No call
Only Claude Opus 4.5 has a AA Intelligence Index result, 29.1.
Directional only
Reasoning
GPQA Diamond
No call
Only Claude Opus 4.5 has a GPQA Diamond result, 85.9%.
Directional only
Math
AIME
No call
Only Claude Opus 4.5 has a AIME result, 95.4%.
Directional only
Knowledge
MMLU Pro
No call
Only Claude Opus 4.5 has a MMLU Pro result, 87.3%.
Directional only
Web design
Design Arena: websites
No call
Only Claude Opus 4.5 has a Design Arena: websites result, 1247.
Directional only
Long documents
Listed context window
Claude Opus 4.5
Claude Opus 4.5 takes 200K tokens against 128K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
GPT-4o-mini (2024-07-18)
Claude Opus 4.5 $0.018, GPT-4o-mini (2024-07-18) $0.0004 per turn.
List prices
Cost per solved task
One SWE-bench Verified task, solved
No call
Only Claude Opus 4.5 has the number, $1.37.
Directional only

At a glance

Coding index: Claude Opus 4.5 44.0 from 3 benchmarks, GPT-4o-mini (2024-07-18) not benchmarked.
Widest category: Math, 44.6 points apart on average over 4 shared benchmarks.
Widest single gap: OTIS Mock AIME: Claude Opus 4.5 86.1% against GPT-4o-mini (2024-07-18) 6.9%, 79.2 points apart on a 0 to 100 scale.
Output price: Claude Opus 4.5 $25.00 against GPT-4o-mini (2024-07-18) $0.60 per million output tokens, 41.7x apart.
Context window: Claude Opus 4.5 takes 200K tokens, GPT-4o-mini (2024-07-18) 128K.

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	Bars	GPT-4o-mini (2024-07-18)	Ties
Coding	3		0
Agentic work	1		0
Reasoning	8		0
Math	4		0
Knowledge	6		0
General	17		0
All shared boards	39		0

CodingLike-for-likeSix of these boards feed the Vibe Coding Index30

Coding benchmarks for Claude Opus 4.5 and GPT-4o-mini (2024-07-18)
Benchmark	Claude Opus 4.5	GPT-4o-mini (2024-07-18)	Leader
Aider polyglot	Not measured	3.6%	Only GPT-4o-mini (2024-07-18) measured
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%	Not measured	Only Claude Opus 4.5 measured
SWE-bench Verified (Vals AI)	76.4%	Not measured	Only Claude Opus 4.5 measured
Vibe Code Bench (Vals AI)	20.6%	Not measured	Only Claude Opus 4.5 measured
LiveCodeBench (Artificial Analysis run)	87.1%	Not measured	Only Claude Opus 4.5 measured
Terminal-Bench Hard (Artificial Analysis run)	47.0%	Not measured	Only Claude Opus 4.5 measured
Terminal-Bench	63.1%	Not measured	Only Claude Opus 4.5 measured
GSO-Bench	26.5%	Not measured	Only Claude Opus 4.5 measured
WeirdML	63.7%	11.8%	Claude Opus 4.5
Cybench	82.0%	Not measured	Only Claude Opus 4.5 measured
LMArena Text: coding	1503	1290	Claude Opus 4.5
LMArena Text: software and IT	1483	1291	Claude Opus 4.5
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

IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index2 boards, none shared

Intelligence benchmarks for Claude Opus 4.5 and GPT-4o-mini (2024-07-18)
Benchmark	Claude Opus 4.5	GPT-4o-mini (2024-07-18)	Leader
AA Intelligence Index	29.1	Not measured	Only Claude Opus 4.5 measured
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 GPT-4o-mini (2024-07-18)
Benchmark	Claude Opus 4.5	GPT-4o-mini (2024-07-18)	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%	Not measured	Only Claude Opus 4.5 measured
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%	17.4%	Claude Opus 4.5
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 index80

Reasoning benchmarks for Claude Opus 4.5 and GPT-4o-mini (2024-07-18)
Benchmark	Claude Opus 4.5	GPT-4o-mini (2024-07-18)	Leader
GPQA Diamond	85.9%	Not measured	Only Claude Opus 4.5 measured
MMMU Pro (Vals AI)	83.0%	Not measured	Only Claude Opus 4.5 measured
GPQA Diamond (Artificial Analysis run)	86.6%	Not measured	Only Claude Opus 4.5 measured
Humanity's Last Exam (Artificial Analysis run)	30.1%	Not measured	Only Claude Opus 4.5 measured
GPQA Diamond (Epoch AI run)	86.0%	37.7%	Claude Opus 4.5
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%	10.7%	Claude Opus 4.5
Chess puzzles	14.0%	3.0%	Claude Opus 4.5
Mystery game puzzles	22.0%	12.0%	Claude Opus 4.5
EBR-bench	14.3%	Not measured	Only Claude Opus 4.5 measured
VPCT	40.0%	34.0%	Claude Opus 4.5
LMArena Text: hard prompts	1476	1267	Claude Opus 4.5
LMArena Text: expert	1487	1234	Claude Opus 4.5
LMArena Text: hard prompts in English	1482	1278	Claude Opus 4.5
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 GPT-4o-mini (2024-07-18)
Benchmark	Claude Opus 4.5	GPT-4o-mini (2024-07-18)	Leader
AIME	95.4%	Not measured	Only Claude Opus 4.5 measured
MGSM (Vals AI)	95.2%	Not measured	Only Claude Opus 4.5 measured
AA Math Index	91.3	Not measured	Only Claude Opus 4.5 measured
AIME 2025 (Artificial Analysis run)	91.3%	Not measured	Only Claude Opus 4.5 measured
OTIS Mock AIME	86.1%	6.9%	Claude Opus 4.5
FrontierMath, tiers 1 to 3	34.4%	0.7%	Claude Opus 4.5
FrontierMath, tier 4	4.9%	Not measured	Only Claude Opus 4.5 measured
ProofBench	36.0%	Not measured	Only Claude Opus 4.5 measured
MATH level 5	Not measured	52.6%	Only GPT-4o-mini (2024-07-18) measured
LMArena Text: math	1463	1267	Claude Opus 4.5
LMArena Text: mathematical work	1468	1271	Claude Opus 4.5
Neither model has a result on the other 3 boards here

KnowledgeLike-for-likePublic boards, shown as published, kept out of the index60

Knowledge benchmarks for Claude Opus 4.5 and GPT-4o-mini (2024-07-18)
Benchmark	Claude Opus 4.5	GPT-4o-mini (2024-07-18)	Leader
MMLU Pro	87.3%	Not measured	Only Claude Opus 4.5 measured
LegalBench (Vals AI)	84.6%	Not measured	Only Claude Opus 4.5 measured
CaseLaw (Vals AI)	62.6%	Not measured	Only Claude Opus 4.5 measured
CorpFin (Vals AI)	65.1%	Not measured	Only Claude Opus 4.5 measured
TaxEval (Vals AI)	74.9%	Not measured	Only Claude Opus 4.5 measured
MortgageTax (Vals AI)	68.7%	Not measured	Only Claude Opus 4.5 measured
MedQA (Vals AI)	95.9%	Not measured	Only Claude Opus 4.5 measured
MedCode (Vals AI)	49.2%	Not measured	Only Claude Opus 4.5 measured
MMLU Pro (Artificial Analysis run)	89.5%	Not measured	Only Claude Opus 4.5 measured
SimpleQA Verified	45.7%	8.3%	Claude Opus 4.5
MMLU	Not measured	76.7%	Only GPT-4o-mini (2024-07-18) measured
GeoBench	75.0%	64.0%	Claude Opus 4.5
LMArena Text: science	1454	1286	Claude Opus 4.5
LMArena Text: medicine and healthcare	1444	1282	Claude Opus 4.5
LMArena Text: legal and government	1459	1305	Claude Opus 4.5
LMArena Text: business and finance	1448	1265	Claude Opus 4.5
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 1 board here

Web designDirectional onlyPublic boards, shown as published, kept out of the index8 boards, none shared

Web design benchmarks for Claude Opus 4.5 and GPT-4o-mini (2024-07-18)
Benchmark	Claude Opus 4.5	GPT-4o-mini (2024-07-18)	Leader
Design Arena: websites	1247	Not measured	Only Claude Opus 4.5 measured
Design Arena: UI components	1236	Not measured	Only Claude Opus 4.5 measured
Design Arena: game dev	1228	Not measured	Only Claude Opus 4.5 measured
Design Arena: data viz	1243	Not measured	Only Claude Opus 4.5 measured
Design Arena: 3D	1213	Not measured	Only Claude Opus 4.5 measured
Design Arena: all code categories	1241	Not measured	Only Claude Opus 4.5 measured
Design Arena: SVG	1180	Not measured	Only Claude Opus 4.5 measured
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 index170

General benchmarks for Claude Opus 4.5 and GPT-4o-mini (2024-07-18)
Benchmark	Claude Opus 4.5	GPT-4o-mini (2024-07-18)	Leader
SAGE (Vals AI)	52.1%	Not measured	Only Claude Opus 4.5 measured
MedScribe (Vals AI)	85.3%	Not measured	Only Claude Opus 4.5 measured
IFBench	58.0%	Not measured	Only Claude Opus 4.5 measured
Long context reasoning (AA-LCR)	77.3%	Not measured	Only Claude Opus 4.5 measured
DTBench	89.9%	Not measured	Only Claude Opus 4.5 measured
LMCA	44.5%	Not measured	Only Claude Opus 4.5 measured
Creative writing (Lech Mazur)	Not measured	67.2%	Only GPT-4o-mini (2024-07-18) 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	1286	Claude Opus 4.5
LMArena Text: instruction following	1478	1258	Claude Opus 4.5
LMArena Text: creative writing	1445	1268	Claude Opus 4.5
LMArena Vision	Not measured	1066	Only GPT-4o-mini (2024-07-18) measured
LMArena Text: English	1461	1301	Claude Opus 4.5
LMArena Text: non-English	1438	1266	Claude Opus 4.5
LMArena Text: Chinese	1470	1265	Claude Opus 4.5
LMArena Text: German	1449	1272	Claude Opus 4.5
LMArena Text: Japanese	1417	1216	Claude Opus 4.5
LMArena Text: Korean	1424	1195	Claude Opus 4.5
LMArena Text: French	1471	1297	Claude Opus 4.5
LMArena Text: Spanish	1457	1276	Claude Opus 4.5
LMArena Text: Russian	1447	1275	Claude Opus 4.5
LMArena Text: Polish	1439	1244	Claude Opus 4.5
LMArena Text: multi-turn	1466	1285	Claude Opus 4.5
LMArena Text: longer queries	1479	1289	Claude Opus 4.5
LMArena Text: writing and language	1452	1282	Claude Opus 4.5
LMArena Text: entertainment and media	1434	1253	Claude Opus 4.5
LMArena Vision: English	Not measured	1072	Only GPT-4o-mini (2024-07-18) measured
LMArena Vision: Chinese	Not measured	1033	Only GPT-4o-mini (2024-07-18) 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 17 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 GPT-4o-mini (2024-07-18)
Benchmark	Claude Opus 4.5	GPT-4o-mini (2024-07-18)	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

GPT-4o-mini (2024-07-18)$0.0004Fits in one request

GPT-4o-mini (2024-07-18) costs less

Repository review

50K input + 3K output tokens

Claude Opus 4.5$0.325Fits in one request

GPT-4o-mini (2024-07-18)$0.0093Fits in one request

GPT-4o-mini (2024-07-18) costs less

Agent loop

200K input + 10K output tokens

Claude Opus 4.5$1.25Exceeds the context window

GPT-4o-mini (2024-07-18)$0.036Exceeds the context window

GPT-4o-mini (2024-07-18) 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 GPT-4o-mini (2024-07-18)
Specification	Anthropic Claude Opus 4.5	OpenAI GPT-4o-mini (2024-07-18)
Maker	Anthropic	OpenAI
Weights	No public weights listed	No public weights listed
Released	November 24, 2025	July 18, 2024
Context window	200K	128K
Input $/Mtok	$5.00	$0.15
Output $/Mtok	$25.00	$0.60
Coding index	44.0	Not benchmarked
Independent measurements behind it	3	0
Cost per solved task	$1.37	Not computable
Source	OpenRouter listing	OpenRouter listing

Questions

Is Claude Opus 4.5 better than GPT-4o-mini (2024-07-18) for coding?

Only Claude Opus 4.5 has a coding score, 44.0 on the Vibe Coding Index; GPT-4o-mini (2024-07-18) has none, so the two cannot be ranked on coding. Pick GPT-4o-mini (2024-07-18) for output tokens 41.7x cheaper ($0.60 vs $25.00 per million).

Which is cheaper, Claude Opus 4.5 or GPT-4o-mini (2024-07-18)?

Claude Opus 4.5 costs $5.00 per million input tokens and $25.00 per million output tokens; GPT-4o-mini (2024-07-18) costs $0.15 and $0.60. Cost per solved task is known for Claude Opus 4.5 only.

Which has the bigger context window, Claude Opus 4.5 or GPT-4o-mini (2024-07-18)?

Claude Opus 4.5, with 200K tokens against 128K.

How many benchmarks is the Claude Opus 4.5 vs GPT-4o-mini (2024-07-18) comparison based on?

39 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 GPT-4o-mini (2024-07-18)'s on 0. Where only one model has a result, the page says so instead of naming a winner.

Claude Opus 4.5 or GPT-4o-mini (2024-07-18): 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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