Claude Fable 5 vs o3
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
Claude Fable 5 by Anthropic wins on 6 of 10 benchmarks against o3 by OpenAI, which leads on 4. This head-to-head comparison covers coding, math, reasoning, speed, and pricing metrics from our benchmark data.
Category-by-Category Breakdown
Coding: In coding, Claude Fable 5 scores 95.0% on SWE-bench Verified compared to o3's 69.1%, while Claude Fable 5 scores 1334 on Design Arena ELO compared to o3's 1074, while Claude Fable 5 scores 1309 on Website Arena ELO compared to o3's 1048.
Reasoning: In reasoning, Claude Fable 5 scores 83.8% on GPQA Diamond compared to o3's 83.3%.
Context: In context, Claude Fable 5 scores 1.0M on Context Length compared to o3's 200K.
Pricing Comparison
Claude Fable 5 costs $10.0/1M input tokens and $50.0/1M output tokens, while o3 costs $2.0/1M input and $8.0/1M output. o3 is the more affordable option for API usage.
Speed Comparison
Claude Fable 5 generates output at 60 tok/s compared to o3's 40 tok/s, and the time to first token is 81680 ms for Claude Fable 5 versus 800 ms for o3. Claude Fable 5 delivers faster throughput.
Verdict
For developers prioritizing coding and speed, Claude Fable 5 has the edge. For those who value affordability, o3 is the stronger choice.
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Claude Fable 5 vs o3 — FAQ
Which is better, Claude Fable 5 or o3?
Claude Fable 5 wins on more benchmarks overall (6 vs 4). However, the best choice depends on your specific needs — each model excels in different areas.
How does Claude Fable 5 compare to o3 for coding?
Claude Fable 5 is better for coding, scoring 95.0% on SWE-bench Verified compared to 69.1%. SWE-bench tests real-world software engineering by resolving actual GitHub issues.
Is Claude Fable 5 cheaper than o3?
Yes, o3 is cheaper. Claude Fable 5 costs $10.0/1M input and $50.0/1M output tokens. o3 costs $2.0/1M input and $8.0/1M output tokens.
Which is faster, Claude Fable 5 or o3?
Claude Fable 5 is faster, generating output at 60 tok/s compared to 40 tok/s. Faster output speed means shorter wait times for API responses.
What benchmarks does the Claude Fable 5 vs o3 comparison cover?
This comparison covers 10 benchmarks including SWE-bench Verified, GPQA Diamond, Output Speed, Time to First Token, Input Cost, Output Cost, Context Length, Cached Input Cost, and more. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.