Claude Haiku 4.5 vs GPT OSS 120B High
Claude Haiku 4.5 and GPT OSS 120B High are closely matched at 25.6 and 25.4 on the LLM Stats Score. GPT OSS 120B High is 10.0x cheaper per token.
Anthropic · OpenAI · Updated for 2026
Which is better?
Claude Haiku 4.5 and GPT OSS 120B High are closely matched on the overall LLM Stats Score at 25.6 and 25.4.
In the 3 individual benchmarks reported for both models, GPT OSS 120B High wins 3; this is a narrower head-to-head signal than the composite indexes.
On price, GPT OSS 120B High is roughly 10.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Claude Haiku 4.5 also accepts a larger context window (200,000 input tokens), making it the stronger choice for long documents and large codebases.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Claude Haiku 4.5
- you process long inputs — it offers a 200,000 token context window
- you want the most recent training data — it shipped Oct 2025
Choose GPT OSS 120B High
- you value its reported benchmark strengths — it wins 3 of 3 exact shared results
- cost matters — it's about 10.0x cheaper per token
- you need open weights you can self-host or fine-tune
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
12 reported for Claude Haiku 4.5 · 7 for GPT OSS 120B High
Claude Haiku 4.5 outperforms in 0 benchmarks, while GPT OSS 120B High is better at 3 benchmarks (AIME 2025, GPQA, MMMLU).
GPT OSS 120B High significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Claude Haiku 4.5 ($1.00/1M tokens) is 10.0x more expensive than GPT OSS 120B High ($0.10/1M tokens).
For output processing, Claude Haiku 4.5 ($5.00/1M tokens) is 10.0x more expensive than GPT OSS 120B High ($0.50/1M tokens).
In conclusion, Claude Haiku 4.5 is more expensive than GPT OSS 120B High.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Claude Haiku 4.5 accepts 200,000 input tokens compared to GPT OSS 120B High's 131,072 tokens. GPT OSS 120B High can generate longer responses up to 131,072 tokens, while Claude Haiku 4.5 is limited to 64,000 tokens.
Input capabilities
Documented input modalities across available providers
Claude Haiku 4.5 supports multimodal inputs, whereas GPT OSS 120B High does not.
Claude Haiku 4.5 can handle both text and other forms of data like images, making it suitable for multimodal applications.
Claude Haiku 4.5
GPT OSS 120B High
License
Usage and distribution terms
Claude Haiku 4.5 is licensed under a proprietary license, while GPT OSS 120B High uses Apache 2.0.
License differences may affect how you can use these models in commercial or open-source projects.
Proprietary
Closed source
Apache 2.0
Open weights
Release Timeline
When each model was launched
Claude Haiku 4.5 was released on 2025-10-15, while GPT OSS 120B High was released on 2025-08-05.
Claude Haiku 4.5 is 2 months newer than GPT OSS 120B High.
Oct 15, 2025
1.0 years ago
2mo newerAug 5, 2025
1.2 years ago
Knowledge Cutoff
When training data ends
Claude Haiku 4.5 has a documented knowledge cutoff of 2025-02-01, while GPT OSS 120B High's cutoff date is not specified.
We can confirm Claude Haiku 4.5's training data extends to 2025-02-01, but cannot make a direct comparison without GPT OSS 120B High's cutoff date.
Feb 2025
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Provider Availability
Claude Haiku 4.5 is available from Anthropic, DeepInfra, Vertex AI. GPT OSS 120B High is available from OpenAI, Fireworks.
Claude Haiku 4.5
GPT OSS 120B High
Outputs Comparison
Judge for yourself.
Run your own prompts against Claude Haiku 4.5 and GPT OSS 120B High side-by-side, then vote on the output you prefer.
FAQ
Common questions about Claude Haiku 4.5 vs GPT OSS 120B High.