Claude Haiku 4.5
Nothing here. The model returned empty. We stared at it for a while.
Claude Haiku 4.5 vs GPT OSS 20B
Compare Claude Haiku 4.5 by Anthropic against GPT OSS 20B by OpenAI, context windows of 200K vs 131K, tested across 54 shared challenges. Updated April 2026.
Which is better, Claude Haiku 4.5 or GPT OSS 20B?
Claude Haiku 4.5 and GPT OSS 20B are both competitive models. Claude Haiku 4.5 costs $1/M input tokens vs $0.02/M for GPT OSS 20B. Context windows: 200K vs 131K tokens. Compare their real outputs side by side below.
Key Differences Between Claude Haiku 4.5 and GPT OSS 20B
Claude Haiku 4.5 is made by anthropic while GPT OSS 20B is from openai. Claude Haiku 4.5 has a 200K token context window compared to GPT OSS 20B's 131K. On pricing, Claude Haiku 4.5 costs $1/M input tokens vs $0.02/M for GPT OSS 20B.
Our Verdict
Claude Haiku 4.5
GPT OSS 20BRunner-up
No community votes yet. On paper, Claude Haiku 4.5 has the edge — newer, bigger context window.
GPT OSS 20B is 50x cheaper per token — worth considering if cost matters.
Too close to call
Writing DNA
Style Comparison
Similarity
100%
Claude Haiku 4.5 uses 3.3x more headings
Claude Haiku 4.5
GPT OSS 20B
61%Vocabulary54%
47wSentence Length17w
0.64Hedging0.26
5.1Bold5.9
6.3Lists3.3
0.20Emoji0.10
2.46Headings0.75
0.17Transitions0.32
Based on 24 + 21 text responses
vsAsk them anything yourself
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
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