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Claude Haiku 4.5 vs o3

Claude Haiku 4.5 leads in 3 of 8 categories

Arena ELO

o3

Cheaper

Claude Haiku 4.5

Faster

Claude Haiku 4.5

Detailed Comparison

CategoryClaude Haiku 4.5o3
ProviderAnthropic OpenAI
Context Window200K 200K
Input Price ($/1M)$0.8 WIN$10
Output Price ($/1M)$4 WIN$40
Arena ELO1290 1350 WIN
Codingunknown unknown
Reasoningunknown unknown
Speed (tokens/sec)~120 t/s WIN~30 t/s
Open SourceNo No

Frequently Asked Questions

Which is cheaper, Claude Haiku 4.5 or o3?

Claude Haiku 4.5 is approximately 90% cheaper than o3 per million tokens.

Which is better for coding, Claude Haiku 4.5 or o3?

Claude Haiku 4.5 scores unknown on coding benchmarks, while o3 scores unknown.

Which has a larger context window?

Claude Haiku 4.5 supports 200K context, while o3 supports 200K.

Is Claude Haiku 4.5 or o3 open source?

Claude Haiku 4.5 is proprietary. o3 is proprietary.

Which ranks higher on the Chatbot Arena leaderboard?

o3 ranks higher with ELO 1350 vs 1290.