GitHub[208K]Try OpenCode

Compare AI models: GPT-5.5 Instant vs GPT-6 Luna

  1. GPT-5.5 InstantOpenAIHollow points use fallbacks · hover for details
  2. GPT-6 LunaOpenAIHollow points use fallbacks · hover for details
ReasoningCodingCost efficiencyContext windowMultimodalTool use
Normalized model capability scores
ModelReasoningCodingCost efficiencyContext windowMultimodalTool use
GPT-5.5 Instant50/100 — Reasoning supported; no comparable benchmark50/100 — No data; neutral placeholder50/100 — No data; neutral placeholder73/10050/10050/100 — Tool calling supported; no comparable benchmark
GPT-6 Luna50/100 — Reasoning supported; no comparable benchmark45/10072/10098/10050/10050/100 — Tool calling supported; no comparable benchmark
Overview
Author
Context length
400K
1.1M
Reasoning
True
True
Input modalities
Text, Image, Pdf
Text, Image, Pdf
Output modalities
Text
Text
Providers
Pricing
Input
Unknown
$0.10/ 1M
Output
Unknown
$0.50/ 1M
Cached input
Unknown
$0.01/ 1M
MomentumLast 2 mo
Unique users
No usage
591K
Completed sessions
No usage
4,656,564
Token share
No usage
0.3%
Tokens
No usage
3.4T+100%
No trend data
AUG 29OCT 23
RetentionWeek 1
Returning users
Pending
66.7%6.5K user-weeks

Related comparisons. Other model pairs to check.