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OpenAI: GPT-5.6 Terra Pro vs OpenAI: o4 Mini

On input price, OpenAI: o4 Mini is ~1.8× cheaper. Verified 2026-10-21.

OpenAI: GPT-5.6 Terra Pro $2.00/$12.00vsOpenAI: o4 Mini $1.10/$4.40

Verdict

On blended price (3:1 input:output), OpenAI: o4 Mini is ~2.3× cheaper ($1.10/$4.40 vs $2.00/$12.00 per 1M tokens).

Pricing

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

MetricOpenAI: GPT-5.6 Terra ProOpenAI: o4 Mini
Input / 1M$2.00$1.10
Output / 1M$12.00$4.40
Cache read / 1M$0.200$0.275
Blended (3:1)$4.50/1M$1.93/1M
Estimated monthly costOpenAI: GPT-5.6 Terra ProOpenAI: o4 Mini
Chatbot10,000 reqs · 800/400 tok$64.00$26.40
Coding agent5,000 reqs · 8000/2000 tok$200.00$88.00
RAG pipeline30,000 reqs · 4000/500 tok$420.00$198.00

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

Specifications & capabilities

MetricOpenAI: GPT-5.6 Terra ProOpenAI: o4 Mini
Context window1.1M200K
Max output128K100K
Vision input✓✓
Tool calling✓✓
Reasoning✓✓

Quality

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

Verified intelligence scores aren't available for both models yet. See the full leaderboard.

Performance

Measured by Artificial Analysis on live endpoints.

Output speed — higher is better
OpenAI: GPT-5.6 Terra Pro80 tok/s
OpenAI: o4 Mini140 tok/s
Latency (TTFT) — lower is better
OpenAI: GPT-5.6 Terra Pro1,300 ms
OpenAI: o4 Mini650 ms
MetricOpenAI: GPT-5.6 Terra ProOpenAI: o4 Mini
Cost per task$0.000016$0.000006

Provider

Infrastructure metrics for the organizations behind these models.

MetricOpenAIOpenAI
Listed endpoints1212
Reliability99.9%99.9%
Avg latency450 ms450 ms
Pricing tiersstandard, batch, provisionedstandard, batch, provisioned

Full details: OpenAI: GPT-5.6 Terra Pro pricing · OpenAI: o4 Mini pricing