CompareAI models
- GPT-5.6 LunaOpenAI
- Step 3.5 Flash 2603StepFun
ReasoningCodingCost efficiencyContext windowMultimodalTool use
| Model | Reasoning | Coding | Cost efficiency | Context window | Multimodal | Tool use |
|---|---|---|---|---|---|---|
| GPT-5.6 Luna | 39/100 | 81/100 | 65/100 | 99/100 | 50/100 | 69/100 |
| Step 3.5 Flash 2603 | 100/100 | 92/100 | 83/100 | 54/100 | 0/100 | 90/100 |
Overview
Author
Context length
1.1M
256K
Reasoning
True
True
Input modalities
Text, Image, Pdf
Text
Output modalities
Text
Text
Providers
Pricing
Input
$0.20/ 1M
$0.10/ 1M
Output
$1.20/ 1M
$0.30/ 1M
Cached input
$0.02/ 1M
$0.02/ 1M
MomentumLast 2 mo
Unique users
403K
No usage
Completed sessions
754,207
No usage
Token share
1.22%
No usage
Tokens
5.3T+100%
No usage
JUL 4AUG 28
No trend data
RetentionWeek 1
Returning users
49.8%18K user-weeks
Pending
Related comparisons. Other model pairs to check.
Nearby alternativeGPT-5.6 Luna vs Gemma-SEA-LION-v4-27B-ITGPT-5.6 Luna·Gemma-SEA-LION-v4-27B-ITNearby alternativeStep 3.5 Flash 2603 vs Gemma-SEA-LION-v4-27B-ITStep 3.5 Flash 2603·Gemma-SEA-LION-v4-27B-ITRelated comparisonGPT-5.6 Luna vs Qwen3.8 FlashGPT-5.6 Luna·Qwen3.8 FlashRelated comparisonStep 3.5 Flash 2603 vs Qwen3.8 FlashStep 3.5 Flash 2603·Qwen3.8 Flash