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Compare AI models: Claude Opus 5.5 vs GPT-5 Nano

  1. Claude Opus 5.5AnthropicHollow points use fallbacks · hover for details
  2. GPT-5 NanoOpenAIHollow points use fallbacks · hover for details
ReasoningCodingCost efficiencyContext windowMultimodalTool use
Normalized model capability scores
ModelReasoningCodingCost efficiencyContext windowMultimodalTool use
Claude Opus 5.5100/10075/1008/10081/10050/10050/100 — Tool calling supported; no comparable benchmark
GPT-5 Nano50/100 — Reasoning supported; no comparable benchmark50/100 — No data; neutral placeholder75/10072/10033/10050/100 — Tool calling supported; no comparable benchmark
Overview
Author
Context length
1M
400K
Reasoning
True
True
Input modalities
Text, Image, Pdf
Text, Image
Output modalities
Text
Text
Providers
Pricing
Input
$4.00/ 1M
$0.05/ 1M
Output
$20/ 1M
$0.40/ 1M
Cached input
Unknown
Unknown
MomentumLast 2 mo
Unique users
1
6.9K
Completed sessions
2
46,585
Token share
0%
0%
Tokens
20M+100%
4.5B-8%
SEP 15NOV 9
SEP 15NOV 9
RetentionWeek 1
Returning users
Pending
Pending

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