OpenAI: GPT-5.6 Terra Pro vs Thinking Machines: Inkling Small
On input price, Thinking Machines: Inkling Small is ~4.4× cheaper. Verified 2026-10-21.
Verdict
On blended price (3:1 input:output), Thinking Machines: Inkling Small is ~7.1× cheaper ($0.450/$1.20 vs $2.00/$12.00 per 1M tokens).
Pricing
Per-million-token list prices, verified 2026-10-21. Green marks the better value.
| Metric | OpenAI: GPT-5.6 Terra Pro | Thinking Machines: Inkling Small |
|---|---|---|
| Input / 1M | $2.00 | $0.450 |
| Output / 1M | $12.00 | $1.20 |
| Cache read / 1M | $0.200 | $0.100 |
| Blended (3:1) | $4.50/1M | $0.637/1M |
| Estimated monthly cost | OpenAI: GPT-5.6 Terra Pro | Thinking Machines: Inkling Small |
|---|---|---|
| Chatbot10,000 reqs · 800/400 tok | $64.00 | $8.40 |
| Coding agent5,000 reqs · 8000/2000 tok | $200.00 | $30.00 |
| RAG pipeline30,000 reqs · 4000/500 tok | $420.00 | $72.00 |
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Specifications & capabilities
| Metric | OpenAI: GPT-5.6 Terra Pro | Thinking Machines: Inkling Small |
|---|---|---|
| Context window | 1.1M | 524K |
| Max output | 128K | 262K |
| 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.
Speed measurements aren't available for both models yet.
Provider
Infrastructure metrics for the organizations behind these models.
| Metric | OpenAI | Thinking Machines Lab |
|---|---|---|
| Listed endpoints | 12 | 3 |
| Reliability | 99.9% | 99.3% |
| Avg latency | 450 ms | 480 ms |
| Pricing tiers | standard, batch, provisioned | standard, free, batch |
Full details: OpenAI: GPT-5.6 Terra Pro pricing · Thinking Machines: Inkling Small pricing