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DeepSeek: DeepSeek V4 Flash 0731 vs OpenAI: GPT-5.6 Terra Pro

On input price, DeepSeek: DeepSeek V4 Flash 0731 is ~4.5× cheaper. Verified 2026-10-21.

DeepSeek: DeepSeek V4 Flash 0731 $0.440/$1.32vsOpenAI: GPT-5.6 Terra Pro $2.00/$12.00

Verdict

On blended price (3:1 input:output), DeepSeek: DeepSeek V4 Flash 0731 is ~6.8× cheaper ($0.440/$1.32 vs $2.00/$12.00 per 1M tokens). OpenAI: GPT-5.6 Terra Pro scores higher on intelligence (57 vs 52, Artificial Analysis) — pay more only if that gap matters for your workload.

Pricing

Per-million-token list prices, verified 2026-10-21. Green marks the better value.

MetricDeepSeek: DeepSeek V4 Flash 0731OpenAI: GPT-5.6 Terra Pro
Input / 1M$0.440$2.00
Output / 1M$1.32$12.00
Cache read / 1M$0.014$0.200
Blended (3:1)$0.660/1M$4.50/1M
Estimated monthly costDeepSeek: DeepSeek V4 Flash 0731OpenAI: GPT-5.6 Terra Pro
Chatbot10,000 reqs · 800/400 tok$8.80$64.00
Coding agent5,000 reqs · 8000/2000 tok$30.80$200.00
RAG pipeline30,000 reqs · 4000/500 tok$72.60$420.00

Plug in your own numbers in the calculator, or paste a real bill into the Bill Shredder.

Specifications & capabilities

MetricDeepSeek: DeepSeek V4 Flash 0731OpenAI: GPT-5.6 Terra Pro
Context window1.0M1.1M
Max output131K128K
Vision input–✓
Tool calling✓✓
Reasoning✓✓

Quality

Intelligence Index by Artificial Analysis (independent evaluations, 0–100).

Intelligence Index — higher is better
DeepSeek: DeepSeek V4 Flash 073152
OpenAI: GPT-5.6 Terra Pro57

Sources: DeepSeek: DeepSeek V4 Flash 0731 on Artificial Analysis · OpenAI: GPT-5.6 Terra Pro on Artificial Analysis

Performance

Measured by Artificial Analysis on live endpoints.

Output speed — higher is better
DeepSeek: DeepSeek V4 Flash 0731200 tok/s
OpenAI: GPT-5.6 Terra Pro80 tok/s
Latency (TTFT) — lower is better
DeepSeek: DeepSeek V4 Flash 0731450 ms
OpenAI: GPT-5.6 Terra Pro1,300 ms
MetricDeepSeek: DeepSeek V4 Flash 0731OpenAI: GPT-5.6 Terra Pro
Cost per task$0.000003$0.000016

Provider

Infrastructure metrics for the organizations behind these models.

MetricDeepSeekOpenAI
Listed endpoints612
Reliability99.6%99.9%
Avg latency480 ms450 ms
Pricing tiersstandard, freestandard, batch, provisioned

Full details: DeepSeek: DeepSeek V4 Flash 0731 pricing · OpenAI: GPT-5.6 Terra Pro pricing