AI Models · Compare
GPT-5.5 mini vs Claude 3.5 Haiku
Side-by-side intelligence, speed, price, benchmarks, strengths and weaknesses.
OpenAI
GPT-5.5 mini
ProprietaryMar 2026
Production workhorse — GPT-5.5 quality reasoning at fast-tier prices.
Anthropic
Claude 3.5 Haiku
ProprietaryNov 2024
Fast + cheap with a huge context — great for RAG and classification.
Head to head
Spec
GPT-5.5 mini
Claude 3.5 Haiku
Intelligence index↑ better
Winner68
58
Speed↑ better
Winner180 tok/s
130 tok/s
Time to first token↓ better
Winner0.28 s
0.5 s
Context window↑ better
Winner400k
200k
Max output↑ better
Winner16k
8k
Input price↓ better
Winner$0.25 / 1M tokens
$0.80 / 1M tokens
Output price↓ better
Winner$1.00 / 1M tokens
$4.00 / 1M tokens
Blended price↓ better
Winner$0.44 / 1M tokens
$1.60 / 1M tokens
License
Proprietary
Proprietary
Input modalities
text, image
text
Output modalities
text
text
Benchmark showdown
MMLU
GPT-5.5 mini
82.5
Claude 3.5 Haiku
80.0
MMLU Pro
GPT-5.5 mini
65.0
Claude 3.5 Haiku
65.0
GPQA
GPT-5.5 mini
44.0
Claude 3.5 Haiku
41.0
MATH
GPT-5.5 mini
76.0
Claude 3.5 Haiku
69.0
HumanEval
GPT-5.5 mini
84.0
Claude 3.5 Haiku
85.0
Strengths, weaknesses and best-for
GPT-5.5 mini
Strengths
- Best $/token in OpenAI lineup
- Very fast
- 400k context
Weaknesses
- Weaker on hard reasoning vs full GPT-5.5
Best for
- High-volume APIs
- Chatbots
- Classification & extraction
Claude 3.5 Haiku
Strengths
- 200k context cheap
- Fast
- Reliable on extraction
Weaknesses
- Weaker reasoning than Sonnet
Best for
- RAG
- Classification
- Form filling
Quick verdict
- Pick GPT-5.5 mini if you want it smarter, faster, cheaper and longer context.
Auto-generated from the spec sheet. Always validate on your own evals.
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