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Model compare

Claude Haiku 4.5 vs GPT-4o

The readout for Claude Haiku 4.5 and GPT-4o, before the detailed comparison sheet.

Model A

Claude Haiku 4.5

Anthropic

Leading
vs

Model B

GPT-4o

OpenAI

Contender

Key Takeaways

Weighted outcome: Claude Haiku 4.5. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.

Decision read

Claude Haiku 4.5

Claude Haiku 4.5 has the higher weighted result; Model A / B score 100 to 0.

Evidence depth

89 data points

Includes 12 benchmark rows, 0 audit samples, and 10 provider examples.

Selection signal

Start with Claude Haiku 4.5

The charts below split 22 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 Haiku 4.5 and GPT-4o: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.

Model compare
Claude Haiku 4.5
GPT-4o
Overall leaderLeadingContender
Weighted overall score100.0 pts0.0 pts
Benchmark category leads4 categories0 categories
Operational advantagesCheapest input price, Average speed, First-token latency, Free providers, Provider coverageNo data
Context window200K tokens128K tokens
Max output64K 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 Haiku 4.5
GPT-4o
DeveloperAnthropicOpenAI
ReleasedOct 2025Nov 2024
ParametersNo dataNo data
TokenizerClaudeGPT
Knowledge cutoffNo data2023-10-31
OpenRouter IDanthropic/claude-haiku-4.5openai/gpt-4o
ReferencesNo dataNo data

When to choose each model

This report only uses LMSpeed data for Claude Haiku 4.5 and GPT-4o: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.

Claude Haiku 4.5

Claude Haiku 4.5 is stronger in benchmark categories (Agents, Coding, Reasoning, Math) and operational dimensions (Cheapest input price, Average speed, First-token latency, Free providers, Provider coverage).

GPT-4o

GPT-4o does not clearly lead in the benchmark or operational dimensions shared by both models.

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
4 / 8
Model B coverage
6 / 8
Shared
4 shared categories

Avg. score

Claude Haiku 4.5

45.6

Avg. score

GPT-4o

43

Agents

Claude Haiku 4.5 leads by 3.5

Claude Haiku 4.542.5
GPT-4o39

Coding

Claude Haiku 4.5 leads by 0.5

Claude Haiku 4.546.5
GPT-4o46

Reasoning

Claude Haiku 4.5 leads by 7.6

Claude Haiku 4.547.5
GPT-4o39.9

Knowledge

GPT-4o

Claude Haiku 4.5-
GPT-4o49

Math

Claude Haiku 4.5 leads by 3.5

Claude Haiku 4.545.7
GPT-4o42.2

Multilingual

No data

Claude Haiku 4.5-
GPT-4o-

Multimodal

No data

Claude Haiku 4.5-
GPT-4o-

Instruction following

GPT-4o

Claude Haiku 4.5-
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 Haiku 4.5

Claude Haiku 4.5

winner

55.0

Rank #55/100 · confidence 1 · eval date 2025-10-15

+12.0

GPT-4o

43.0

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

Pricingverified

Input price

SourceClaude 4.5 Haiku (Non-reasoning)

Claude Haiku 4.5

winner

$1.00/M

Rank #110/180 · confidence 4

+$1.50/M

GPT-4o

$2.50/M

Rank #150/180 · confidence 4

Pricingverified

Blended price

SourceClaude 4.5 Haiku (Non-reasoning)

Claude Haiku 4.5

winner

$2.00/M

Rank #118/180 · confidence 4

+$2.38/M

GPT-4o

$4.38/M

Rank #145/180 · confidence 4

Pricingverified

Output price

SourceClaude 4.5 Haiku (Non-reasoning)

Claude Haiku 4.5

winner

$5.00/M

Rank #123/180 · confidence 4

+$5.00/M

GPT-4o

$10.00/M

Rank #138/180 · confidence 4

Reasoningverified

MMLU-Pro

SourceClaude 4.5 Haiku (Non-reasoning)

Claude Haiku 4.5

winner

80.0%

Rank #63/129 · confidence 4

+5.2%

GPT-4o

74.8%

Rank #90/129 · confidence 4

Reasoningverified

GPQA

SourceClaude 4.5 Haiku (Non-reasoning)

Claude Haiku 4.5

winner

64.6%

Rank #153/212 · confidence 4

+10.3%

GPT-4o

54.3%

Rank #178/212 · confidence 4

Reasoningverified

HLE

SourceClaude 4.5 Haiku (Non-reasoning)

Claude Haiku 4.5

winner

4.2%

Rank #170/209 · confidence 4

+1.8%

GPT-4o

2.4%

Rank #207/209 · confidence 4

Codingverified

LiveCodeBench

SourceClaude 4.5 Haiku (Non-reasoning)

Claude Haiku 4.5

winner

51.1%

Rank #59/115 · confidence 4

+20.2%

GPT-4o

30.9%

Rank #88/115 · confidence 4

Codingverified

SciCode

SourceClaude 4.5 Haiku (Non-reasoning)

Claude Haiku 4.5

winner

34.4%

Rank #133/205 · confidence 4

+1.1%

GPT-4o

33.3%

Rank #138/205 · confidence 4

Mathreported

FrontierMath v2 (Tiers 1-3)

SourceClaude Haiku 4.5

Claude Haiku 4.5

winner

5.9

Rank #36/47 · confidence 1 · eval date 2025-10-15

+5.6

GPT-4o

0.3

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

Mathreported

BenchLM Math score

SourceClaude Haiku 4.5

Claude Haiku 4.5

winner

29.0

Rank #49/62 · confidence 1 · eval date 2025-10-15

+3.8

GPT-4o

25.2

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

Multimodalreported

Design Arena Website

SourceClaude Haiku 4.5

Claude Haiku 4.5

winner

1133.0

Rank #62/75 · confidence 1 · eval date 2025-10-15

+291.0

GPT-4o

842.0

Rank #74/75 · 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 Haiku 4.5
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 Haiku 4.5
GPT-4o
速创API20 tests

Claude Haiku 4.5

speed / latency

N/A / N/A

input / output

No data

GPT-4o

speed / latency

88 tok/s / 1593ms

input / output

No data

N1N15 tests

Claude Haiku 4.5

speed / latency

112 tok/s / 1733ms

input / output

No data

GPT-4o

speed / latency

N/A / N/A

input / output

No data

Completions5 tests

Claude Haiku 4.5

speed / latency

21 tok/s / 1170ms

input / output

No data

GPT-4o

speed / latency

N/A / N/A

input / output

No data

KFCV505 tests

Claude Haiku 4.5

speed / latency

N/A / N/A

input / output

No data

GPT-4o

speed / latency

48 tok/s / 13138ms

input / output

No data

My Claude Code5 tests

Claude Haiku 4.5

speed / latency

109 tok/s / 2221ms

input / output

No data

GPT-4o

speed / latency

N/A / N/A

input / output

No data

Dext API

Claude Haiku 4.5

claude-haiku-4-5

speed / latency

No data

input / output

$0.082/M/$0.411/M

GPT-4o

gpt-4o

speed / latency

No data

input / output

$0/M/$0/M

Moyanjdc API

Claude Haiku 4.5

claude-haiku-4-5

speed / latency

No data

input / output

$0/M/$0/M

GPT-4o

gpt-4o

speed / latency

No data

input / output

$75.00/M/$300.00/M

兔子API

Claude Haiku 4.5

claude-haiku-4-5-20251001

speed / latency

No data

input / output

$0/request

GPT-4o

gpt-4o-all

speed / latency

No data

input / output

$0/request

Gpt API

Claude Haiku 4.5

claude-haiku-4-5-20251001

speed / latency

No data

input / output

$0.0029/M/$0.014/M

GPT-4o

gpt-4o-2024-08-06

speed / latency

No data

input / output

$0.429/M/$1.71/M

Newagiai

Claude Haiku 4.5

claude-haiku-4-5-20251001

speed / latency

No data

input / output

$0.110/M/$0.548/M

GPT-4o

gpt-4o-all

speed / latency

No data

input / output

$0.0066/request

FAQ

Weighted outcome: Claude Haiku 4.5. 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.