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reasoning benchmark

SWE-Lancer (IC-Diamond subset)

SWE-Lancer (IC-Diamond subset) is a benchmark of real-world freelance software engineering tasks from Upwork, ranging from $50 bug fixes to $32,000 feature implementations. It evaluates AI models on independent engineering tasks using end-to-end tests triple-verified by experienced software engineers, and includes managerial tasks where models choose between technical implementation proposals.

Updated Aug 11, 2026

Models6
Model coverage6
MetricScore
EvidenceB

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  • FAQ

SWE-Lancer (IC-Diamond subset) Ranking

Higher score ranks better on this benchmark.

6 rows
Columns

Show columns

01OPGPT-5OpenAI100.0%100.0%6CAug 11, 2026
02OPGPT-5.3 CodexOpenAI81.4%80.0%6CAug 11, 2026
03OPGPT-5.2OpenAI74.6%60.0%6CAug 11, 2026
04OPGPT-4.5OpenAI17.4%40.0%6CAug 11, 2026
05OPGPT-4oOpenAI12.4%20.0%6CAug 11, 2026
06OPo3-miniOpenAI7.4%0.0%6CAug 11, 2026

SWE-Lancer (IC-Diamond subset) Score Distribution

A closer view of the leading scores on this benchmark.

SWE-Lancer (IC-Diamond subset)

SWE-Lancer (IC-Diamond subset) Highlights

The leading models and scores on this benchmark.

Rank #1GPT-5100.0%Rank #2GPT-5.3 Codex81.4%Rank #3GPT-5.274.6%Rank #4GPT-4.517.4%

What is SWE-Lancer (IC-Diamond subset)?

What SWE-Lancer (IC-Diamond subset) measures and how its scores work.

SWE-Lancer (IC-Diamond subset) is a benchmark of real-world freelance software engineering tasks from Upwork, ranging from $50 bug fixes to $32,000 feature implementations. It evaluates AI models on independent engineering tasks using end-to-end tests triple-verified by experienced software engineers, and includes managerial tasks where models choose between technical implementation proposals.

Scores are shown in ratio. This benchmark is not independently verified and has an evidence level of B.

Family
SWE-Lancer (IC-Diamond subset)
Modality
text
Primary category
reasoning
Score direction
higher
LLMBoard eligible
Yes
Evaluation key
swe-lancer-(ic-diamond-subset)|llm-stats-current

Benchmark scores retain their original unit. Overall score eligibility is shown separately.

FAQ

Common questions about SWE-Lancer (IC-Diamond subset).

Which model scores highest on SWE-Lancer (IC-Diamond subset)?

GPT-5 is currently ranked first with 100.0%.

What does SWE-Lancer (IC-Diamond subset) measure?

SWE-Lancer (IC-Diamond subset) is a benchmark of real-world freelance software engineering tasks from Upwork, ranging from $50 bug fixes to $32,000 feature implementations. It evaluates AI models on independent engineering tasks using end-to-end tests triple-verified by experienced software engineers, and includes managerial tasks where models choose between technical implementation proposals.

Is a higher score better?

Yes. Higher values rank better for this benchmark.

How many models are compared?

6 model results are currently shown.

Does this benchmark affect the overall score?

Yes. This benchmark can contribute to the current LLMBoard capability score.