Sponsored byFusecodeEnterprise coding API for Claude Code, Codex, and model workflows.
LogoLMSpeed
Back to models

Model compare

Claude Opus 4.8 vs GPT-4o

The readout for Claude Opus 4.8 and GPT-4o, before the detailed comparison sheet.

Model A

Claude Opus 4.8

Anthropic

Leading
vs

Model B

GPT-4o

OpenAI

Contender

Key Takeaways

Weighted outcome: Claude Opus 4.8. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.

Decision read

Claude Opus 4.8

Claude Opus 4.8 has the higher weighted result; Model A / B score 96 to 4.

Evidence depth

101 data points

Includes 18 benchmark rows, 0 audit samples, and 10 provider examples.

Selection signal

Start with Claude Opus 4.8

The charts below split 28 high-signal samples across speed, scores, and audit health.

Change comparison

Switch either side of this report to compare another model with the same LMSpeed data pipeline.

Select a different model to open a new comparison URL.

Comparison sheet

This report only uses LMSpeed data for Claude Opus 4.8 and GPT-4o: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.

Model compare
Claude Opus 4.8
GPT-4o
Overall leaderLeadingContender
Weighted overall score96.0 pts4.0 pts
Benchmark category leads6 categories0 categories
Operational advantagesCheapest input price, Average speed, First-token latency, Provider coverageFree providers
Context window1M tokens128K tokens
Max output128K tokens16.4K tokens
Modalities

Input

TextImageFile

Output

Text

Input

TextImageFile

Output

Text
Features
Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning
Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeWeb search

The overall result weights benchmark capability categories at 80% and price, API speed/latency, and availability at 20%. Recent test volume does not affect the winner, and missing benchmark categories are excluded.

Model metadata

Model compare
Claude Opus 4.8
GPT-4o
DeveloperAnthropicOpenAI
ReleasedMay 2026Nov 2024
ParametersNo dataNo data
TokenizerClaudeGPT
Knowledge cutoffNo data2023-10-31
OpenRouter IDanthropic/claude-opus-4.8openai/gpt-4o
ReferencesNo dataNo data

When to choose each model

This report only uses LMSpeed data for Claude Opus 4.8 and GPT-4o: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.

Claude Opus 4.8

Claude Opus 4.8 is stronger in benchmark categories (Agents, Coding, Reasoning, Knowledge, Math) and operational dimensions (Cheapest input price, Average speed, First-token latency, Provider coverage).

GPT-4o

GPT-4o has these operational advantages: Free providers.

Benchmark score comparison

Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.

Category performance

Compare benchmark category scores on a 0-100 scale. Select a category to inspect the gap.

Model A coverage
8 / 8
Model B coverage
6 / 8
Shared
6 shared categories

Avg. score

Claude Opus 4.8

58.8

Avg. score

GPT-4o

43

Agents

Claude Opus 4.8 leads by 23.6

Claude Opus 4.862.6
GPT-4o39

Coding

Claude Opus 4.8 leads by 19.2

Claude Opus 4.865.2
GPT-4o46

Reasoning

Claude Opus 4.8 leads by 16.5

Claude Opus 4.856.4
GPT-4o39.9

Knowledge

Claude Opus 4.8 leads by 14.7

Claude Opus 4.863.7
GPT-4o49

Math

Claude Opus 4.8 leads by 15.8

Claude Opus 4.858
GPT-4o42.2

Multilingual

Claude Opus 4.8

Claude Opus 4.855
GPT-4o-

Multimodal

Claude Opus 4.8

Claude Opus 4.859.6
GPT-4o-

Instruction following

Claude Opus 4.8 leads by 8.3

Claude Opus 4.849.9
GPT-4o41.6

Professional benchmark details

Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.

Aggregatereported

BenchLM overall score

SourceClaude Opus 4.8

Claude Opus 4.8

winner

76.0

Rank #8/100 · confidence 3 · eval date 2026-05-28

+33.0

GPT-4o

43.0

Rank #91/100 · confidence 1 · eval date 2024-05-13

Pricingverified

Output price

SourceClaude Opus 4.8 (Adaptive Reasoning, Max Effort)

Claude Opus 4.8

$25.00/M

Rank #165/180 · confidence 4

+$15.00/M

GPT-4o

winner

$10.00/M

Rank #138/180 · confidence 4

Pricingverified

Blended price

SourceClaude Opus 4.8 (Adaptive Reasoning, Max Effort)

Claude Opus 4.8

$10.00/M

Rank #165/180 · confidence 4

+$5.63/M

GPT-4o

winner

$4.38/M

Rank #145/180 · confidence 4

Pricingverified

Input price

SourceClaude Opus 4.8 (Adaptive Reasoning, Max Effort)

Claude Opus 4.8

$5.00/M

Rank #164/180 · confidence 4

+$2.50/M

GPT-4o

winner

$2.50/M

Rank #150/180 · confidence 4

Reasoningverified

HLE

SourceClaude Opus 4.8 (Adaptive Reasoning, Max Effort)

Claude Opus 4.8

winner

48.7%

Rank #6/209 · confidence 4

+46.3%

GPT-4o

2.4%

Rank #207/209 · confidence 4

Reasoningverified

GPQA

SourceClaude Opus 4.8 (Adaptive Reasoning, Max Effort)

Claude Opus 4.8

winner

92.0%

Rank #17/212 · confidence 4

+37.7%

GPT-4o

54.3%

Rank #178/212 · confidence 4

Codingverified

SciCode

SourceClaude Opus 4.8 (Adaptive Reasoning, Max Effort)

Claude Opus 4.8

winner

53.5%

Rank #16/205 · confidence 4

+20.2%

GPT-4o

33.3%

Rank #138/205 · confidence 4

Codingreported

AA-SciCode

SourceClaude Opus 4.8

Claude Opus 4.8

winner

53.5

Rank #18/108 · confidence 3 · eval date 2026-05-28

+20.2

GPT-4o

33.3

Rank #91/108 · confidence 1 · eval date 2024-05-13

Mathreported

FrontierMath v2 (Tiers 1-3)

SourceClaude Opus 4.8

Claude Opus 4.8

winner

47.2

Rank #8/47 · confidence 3 · eval date 2026-05-28

+46.9

GPT-4o

0.3

Rank #47/47 · confidence 1 · eval date 2024-05-13

Mathreported

BenchLM Math score

SourceClaude Opus 4.8

Claude Opus 4.8

winner

66.8

Rank #22/62 · confidence 3 · eval date 2026-05-28

+41.6

GPT-4o

25.2

Rank #60/62 · confidence 1 · eval date 2024-05-13

Knowledgereported

AA-HLE

SourceClaude Opus 4.8

Claude Opus 4.8

winner

48.7

Rank #4/108 · confidence 3 · eval date 2026-05-28

+46.3

GPT-4o

2.4

Rank #108/108 · confidence 1 · eval date 2024-05-13

Knowledgereported

Artificial Analysis Intelligence Index

SourceClaude Opus 4.8

Claude Opus 4.8

winner

57.3

Rank #7/111 · confidence 3 · eval date 2026-05-28

+46.2

GPT-4o

11.1

Rank #101/111 · confidence 1 · eval date 2024-05-13

Knowledgereported

AA-Omniscience Accuracy

SourceClaude Opus 4.8

Claude Opus 4.8

winner

48.8

Rank #16/101 · confidence 3 · eval date 2026-05-28

+28.9

GPT-4o

19.9

Rank #86/101 · confidence 1 · eval date 2024-05-13

Knowledgereported

AA-GPQA Diamond

SourceClaude Opus 4.8

Claude Opus 4.8

winner

92.0

Rank #17/108 · confidence 3 · eval date 2026-05-28

+37.7

GPT-4o

54.3

Rank #102/108 · confidence 1 · eval date 2024-05-13

Knowledgereported

AA-Omniscience Hallucination Rate

SourceClaude Opus 4.8

Claude Opus 4.8

winner

39.3

Rank #85/101 · confidence 3 · eval date 2026-05-28

+1.4

GPT-4o

37.9

Rank #86/101 · confidence 1 · eval date 2024-05-13

Multimodalreported

Design Arena Website

SourceClaude Opus 4.8

Claude Opus 4.8

winner

1273.0

Rank #28/75 · confidence 3 · eval date 2026-05-28

+431.0

GPT-4o

842.0

Rank #74/75 · confidence 1 · eval date 2024-05-13

Instruction followingreported

AA-IFBench

SourceClaude Opus 4.8

Claude Opus 4.8

winner

62.2

Rank #49/84 · confidence 3 · eval date 2026-05-28

+27.9

GPT-4o

34.3

Rank #80/84 · confidence 1 · eval date 2024-05-13

Agentsreported

τ²-bench results

SourceClaude Opus 4.8

Claude Opus 4.8

winner

94.4

Rank #23/82 · confidence 3 · eval date 2026-05-28

+69.3

GPT-4o

25.1

Rank #73/82 · confidence 1 · eval date 2024-05-13

API audit comparison

Latest completed audits from shared providers, with four safety and integrity score groups plus report links.

Provider
Claude Opus 4.8
GPT-4o
No completed audits are available from shared providers yet.

Provider examples

Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.

Provider
Claude Opus 4.8
GPT-4o
速创API20 tests

Claude Opus 4.8

speed / latency

N/A / N/A

input / output

No data

GPT-4o

speed / latency

88 tok/s / 1593ms

input / output

No data

CatClaw API10 tests

Claude Opus 4.8

speed / latency

N/A / N/A

input / output

No data

GPT-4o

speed / latency

57 tok/s / 3381ms

input / output

No data

BUZZ5 tests

Claude Opus 4.8

speed / latency

50 tok/s / 4823ms

input / output

No data

GPT-4o

speed / latency

N/A / N/A

input / output

No data

KFCV505 tests

Claude Opus 4.8

speed / latency

N/A / N/A

input / output

No data

GPT-4o

speed / latency

48 tok/s / 13138ms

input / output

No data

YUNWU API5 tests

Claude Opus 4.8

speed / latency

N/A / N/A

input / output

No data

GPT-4o

speed / latency

58 tok/s / 2583ms

input / output

No data

Dext API

Claude Opus 4.8

claude-opus-4-8

speed / latency

No data

input / output

$0/M/$0/M

GPT-4o

gpt-4o

speed / latency

No data

input / output

$0/M/$0/M

兔子API

Claude Opus 4.8

claude-opus-4-8

speed / latency

No data

input / output

$0/request

GPT-4o

gpt-4o-all

speed / latency

No data

input / output

$0/request

Crond

Claude Opus 4.8

claude-opus-4-8-免费

speed / latency

No data

input / output

$0.0030/request

GPT-4o

gpt-4o-2024-08-06

speed / latency

No data

input / output

$2.50/M/$10.00/M

Newagiai

Claude Opus 4.8

claude-opus-4-8-thinking

speed / latency

No data

input / output

$0.548/M/$2.74/M

GPT-4o

gpt-4o-all

speed / latency

No data

input / output

$0.0066/request

柏拉图AI

Claude Opus 4.8

claude-opus-4-8

speed / latency

No data

input / output

$0.548/M/$2.74/M

GPT-4o

gpt-4o-all

speed / latency

No data

input / output

$0.0066/request

FAQ

Weighted outcome: Claude Opus 4.8. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.

Why is this comparison indexable?
It has 6 verifiable comparison points, and both models have pricing or benchmark data.
Are missing metrics invented?
No. Metrics without LMSpeed data are omitted from this report.

Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.