LLM Comparison

Gemini 3.7 Flash vs GPT-5.6 Luna

Side-by-side specs, pricing & capabilities · Updated September 2026

Price vs Intelligence

8574645342$0.49$1.10$1.71$2.32$2.93Avg Price per M tokensIntelligenceGemini 3.7 Flash75.2 / $2.25GPT-5.6 Luna52.3 / $0.70

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2/6 models
Same tier:
 GoogleGemini 3.7 FlashOpenAIGPT-5.6 Luna
OrganizationGoogleGoogleOpenAIOpenAI
OpenTools Score
75
33.4
52
74.7
FamilyGeminiGPT-5.6
StatusCurrentCurrent
Release DateAug 2026Jul 2026
Context Window1.0M tokens1.1M tokens
Input Price$0.75/M tokens$0.20/M tokens
Output Price$3.75/M tokens$1.20/M tokens
Pricing NotesGoogle introductory pricing is $0.75 input and $3.75 output per 1M tokens through December 31, 2026. Standard pricing becomes $1.50 input and $7.50 output per 1M tokens on January 1, 2027.OpenAI pricing page lists $1 input and $6 output per 1M tokens, plus GPT-5.6 cache-write and cache-read pricing.
Capabilities
reasoningcodingagentictool-usemultimodallong-contextimage-understandingaudio-understandingvideo-understanding
textvisionreasoningcodingtool-useweb-searchfile-searchcomputer-useagents
Training CutoffMarch 2026; some domains may be limited to January 2025Feb 16, 2026
Max Output66K tokens128K tokens
API Identifiergemini-3.7-flashgpt-5.6-luna
Benchmarks
Artificial Analysis Intelligence Index v4.1.1
56artificial-analysis
—
Artificial Analysis Intelligence Index v4.3
39https://artificialanalysis.ai/models/gemini-3-7-flash
37.5048artificial-analysis
GPQA Diamond
94.5455artificial-analysis
91.1111artificial-analysis
SciCode
57.1759artificial-analysis
53.588artificial-analysis
Terminal-Bench 2.1
85.7678artificial-analysis
80.8989artificial-analysis
Artificial Analysis Intelligence Index—
51artificial-analysis
Artificial Analysis Coding Agent Index—
74.6artificial-analysis
 View Gemini 3.7 FlashView GPT-5.6 Luna

Cost Calculator

Enter your expected monthly token usage to compare costs.

ModelInputOutputTotal / movs Best
GPT-5.6 LunaCheapest$0.20$0.60$0.80—
Gemini 3.7 Flash$0.75$1.88$2.63+228%

Google

Gemini 3.7 Flash

Gemini 3.7 Flash is Google's multimodal reasoning model for coding, agentic workflows, and complex knowledge work. It supports text, image, audio, and video input, customizable thinking, a 1M context window, 64K text output, and access through the Gemini API.

OpenAI

GPT-5.6 Luna

GPT-5.6 Luna is OpenAI lower-cost GPT-5.6 model for high-volume reasoning, coding, and agentic workloads. OpenAI model docs list the same 1.05M token context window, 128K max output, and major tool support as the larger GPT-5.6 variants.

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