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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 5.598/10075/1008/10080/10050/10050/100 — Tool calling supported; no comparable benchmark
GPT-5 Nano50/100 — Reasoning supported; no comparable benchmark50/100 — No data; neutral placeholder75/10071/10033/10050/100 — 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
$0.20/ 1M
$0.005/ 1M
MomentumLast 2 mo
Unique users
1
5.6K
Completed sessions
2
40,144
Token share
0%
0%
Tokens
20M+100%
3.1B-53%
SEP 21NOV 15
SEP 21NOV 15
RetentionWeek 1
Returning users
Pending
Pending

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