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Claude Opus 4.5 vs GPT-5.4 Mini

Head to head on 25 shared benchmarks, with price, context window, and release dates.

Benchmark scores

46

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Model
Claude Opus 4.5

Anthropic

61.3%35.6%6.1%1683elo73.120.7%81.0%13.2%43.0%83.5%78.1%79.7%74.4%62.5%81.3%90.4%80.1%68.7%36.0%45.0%47.0%74.3%40.9%20.6%86.3%62.7%-16.7%-84.7%12.1383.8%73.8%45.2%83.2%88.9%100.0%37.477.5%45.370.7%79.2%61.8---62.2%
GPT-5.4 Mini

OpenAI

60.9%21.2%3.9%1662elo7328.3%60.6%5.9%38.8%80.3%70.9%71.6%70.9%60.3%71.5%78.6%72.5%63.5%21.0%50.8%39.6%71.2%18.2%48.0%23.4%-37.0%-45.4%--------------61.739.6%54.2%48.4%
2 / 2 models
AttributeClaude Opus 4.5

Anthropic

GPT-5.4 Mini

OpenAI

DescriptionClaude Opus 4.5 is an AI model from Anthropic.GPT-5.4 mini is an AI model from OpenAI.
FamilyClaudeGPT
Params--
Open weightsclosedclosed
Licenseproprietaryproprietary
Released24 Nov 202517 Mar 2026
Context200,000400,000
Input $/1M$5.00$0.75
Output $/1M$25.00$4.50
Cache read $/1M$0.500$0.075
Cache write $/1M$6.250-
Speed0 tok/s0 tok/s
Latency0.00 s0.00 s
Modalitiesfile, image, textfile, image, text
Providers--
PublisherAnthropicOpenAI
Reported scores
GPQA Diamond60.6% (AA)
IFBench38.8% (AA)
SciCode39.6% (AA)

FAQ

Is Claude Opus 4.5 or GPT-5.4 Mini better?
Across the 25 benchmarks both models report on Sophon, Claude Opus 4.5 leads on 22 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
How do Claude Opus 4.5 and GPT-5.4 Mini compare on GPQA Diamond?
Claude Opus 4.5 scores 81.0% and GPT-5.4 Mini scores 60.6% on GPQA Diamond.
Which is cheaper, Claude Opus 4.5 or GPT-5.4 Mini?
GPT-5.4 Mini is cheaper at $4.50 per million output tokens against $25.00 for Claude Opus 4.5 - about 5.6x.
When were Claude Opus 4.5 and GPT-5.4 Mini released?
Claude Opus 4.5 was released 24 Nov 2025 by Anthropic. GPT-5.4 Mini was released 17 Mar 2026 by OpenAI.

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