GPT-OSS 120B vs o3
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
GPT-OSS 120B by OpenAI and o3 by OpenAI are evenly matched across 8 benchmarks. This head-to-head comparison covers coding, math, reasoning, speed, and pricing metrics from our benchmark data.
Category-by-Category Breakdown
Coding: In coding, o3 scores 1074 on Design Arena ELO compared to GPT-OSS 120B's 974, while o3 scores 1048 on Website Arena ELO compared to GPT-OSS 120B's 980.
Reasoning: In reasoning, o3 scores 83.3% on GPQA Diamond compared to GPT-OSS 120B's 74.9%.
Context: In context, o3 scores 200K on Context Length compared to GPT-OSS 120B's 131K.
Pricing Comparison
GPT-OSS 120B costs $0.04/1M input tokens and $0.17/1M output tokens, while o3 costs $2.0/1M input and $8.0/1M output. GPT-OSS 120B is the more affordable option for API usage.
Speed Comparison
GPT-OSS 120B generates output at 339 tok/s compared to o3's 40 tok/s, and the time to first token is 440 ms for GPT-OSS 120B versus 800 ms for o3. GPT-OSS 120B delivers faster throughput.
Verdict
GPT-OSS 120B leads across the board in affordability, speed, making it the stronger overall choice in this comparison.
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GPT-OSS 120B vs o3 — FAQ
Which is better, GPT-OSS 120B or o3?
GPT-OSS 120B and o3 are evenly matched across benchmarks. The best choice depends on your specific priorities such as coding ability, speed, or pricing.
How does GPT-OSS 120B compare to o3 for coding?
SWE-bench Verified data is not available for both models. Check the detailed comparison charts above for other coding-related metrics.
Is GPT-OSS 120B cheaper than o3?
Yes, GPT-OSS 120B is cheaper. GPT-OSS 120B costs $0.04/1M input and $0.17/1M output tokens. o3 costs $2.0/1M input and $8.0/1M output tokens.
Which is faster, GPT-OSS 120B or o3?
GPT-OSS 120B is faster, generating output at 339 tok/s compared to 40 tok/s. Faster output speed means shorter wait times for API responses.
What benchmarks does the GPT-OSS 120B vs o3 comparison cover?
This comparison covers 8 benchmarks including GPQA Diamond, Output Speed, Time to First Token, Input Cost, Output Cost, Context Length, Design Arena ELO, Website Arena ELO. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.