GPT-5.6 Terra vs o3
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
GPT-5.6 Terra by OpenAI wins on 3 of 5 benchmarks against o3 by OpenAI, which leads on 1. This head-to-head comparison covers coding, math, reasoning, speed, and pricing metrics from our benchmark data.
Category-by-Category Breakdown
Reasoning: In reasoning, GPT-5.6 Terra scores 89.0% on GPQA Diamond compared to o3's 83.3%.
Context: In context, GPT-5.6 Terra scores 1.1M on Context Length compared to o3's 200K.
Pricing Comparison
GPT-5.6 Terra costs $2.0/1M input tokens and $12.0/1M output tokens, while o3 costs $2.0/1M input and $8.0/1M output. Both models are priced identically for input tokens.
Verdict
GPT-5.6 Terra and o3 are closely matched. The best choice depends on your specific use case and priorities.
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GPT-5.6 Terra vs o3 — FAQ
Which is better, GPT-5.6 Terra or o3?
GPT-5.6 Terra wins on more benchmarks overall (3 vs 1). However, the best choice depends on your specific needs — each model excels in different areas.
How does GPT-5.6 Terra 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-5.6 Terra cheaper than o3?
Both models are priced the same at $2.0/1M input tokens. GPT-5.6 Terra output costs $12.0/1M and o3 output costs $8.0/1M.
Which is faster, GPT-5.6 Terra or o3?
Output speed data is not available for both models. Check the speed section of the comparison above for available performance data.
What benchmarks does the GPT-5.6 Terra vs o3 comparison cover?
This comparison covers 5 benchmarks including GPQA Diamond, Input Cost, Output Cost, Context Length, Cached Input Cost. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.