LLM Comparison

DeepSeek V4 Pro vs GPT-5.6 Luna

Side-by-side specs, pricing & capabilities

Price vs Intelligence

7064595347$0.49$1.23$1.96$2.70$3.43Avg Price per M tokensIntelligenceDeepSeek V4 Pro56.9 / $2.64GPT-5.6 Luna60.3 / $0.70

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2/6 models
Same tier:
 DeepSeekDeepSeek V4 ProOpenAIGPT-5.6 Luna
OrganizationDeepSeekDeepSeekOpenAIOpenAI
OpenTools Score
57
21.6
60
86.1
FamilyDeepSeek V4GPT-5.6
StatusCurrentCurrent
Release DateAug 2026Jul 2026
Context Window1.0M tokens1.1M tokens
Input Price$1.32/M tokens$0.20/M tokens
Output Price$3.96/M tokens$1.20/M tokens
Pricing NotesDeepSeek direct API, DeepSeek-V4-Pro-0813: headline prices are peak uncached input $1.32 and output $3.96 per million tokens. Off-peak input is $0.66 and output $1.98; cache-hit input is $0.044 peak/$0.022 off-peak. Peak hours are 01:00-04:00 and 06:00-10:00 UTC Monday-Friday; all other hours are off-peak. DeepSeek has withdrawn the planned September 14, 2026 retirement and continues this API. Rates are conditional, not an unconditional off-peak offer.OpenAI pricing page lists $1 input and $6 output per 1M tokens, plus GPT-5.6 cache-write and cache-read pricing.
Capabilities
reasoningcodingtool-usestructured-outputlong-contextagenticresponses-api
textvisionreasoningcodingtool-useweb-searchfile-searchcomputer-useagents
Training Cutoff—Feb 16, 2026
Max Output393K tokens128K tokens
API Identifierdeepseek-v4-progpt-5.6-luna
Benchmarks
Artificial Analysis Intelligence Index v4.3
36.3 indexartificial-analysis
37.5 indexartificial-analysis
GPQA Diamond
92.8%artificial-analysis
91.1%artificial-analysis
SciCode
51%artificial-analysis
53.6%artificial-analysis
Terminal-Bench 2.1
78.7%artificial-analysis
80.9%artificial-analysis
 View DeepSeek V4 ProView 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—
DeepSeek V4 Pro$1.32$1.98$3.30+313%

DeepSeek

DeepSeek V4 Pro

DeepSeek V4 Pro 0813 is an open-weight Mixture-of-Experts reasoning model for long-context coding, tool use, and agentic workloads, with native Responses API support through the DeepSeek 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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