GPT-6.1 Terra vs Step 5 Preview
Price, context window & benchmark comparison
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Verdict: Step 5 Preview is 29% cheaper than GPT-6.1 Terra on a typical 3:1 input/output mix. GPT-6.1 Terra scores higher on the Artificial Analysis Intelligence Index (51 vs 28.5). GPT-6.1 Terra has the larger context window (1.1M vs 1M).
| GPT-6.1 Terra | Step 5 Preview | |
|---|---|---|
| Input price / 1M | $1.00 | $1.00 |
| Output price / 1M | $5.00 | $2.70 |
| Blended price (3:1) | $2.00 | $1.43 |
| Cached input / 1M | $0.05 | $0.10 |
| Context window | 1.1M | 1M |
| Max output | 128K | 64K |
| Intelligence index | 51 | 28.5 |
| Coding index | — | — |
| Providers | 4 | — |
| Best provider uptime (30m) | 100.0% | — |
| Vision input | Yes | Yes |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| Released | 2026-10-26 | 2026-10-08 |
| Retirement | — | — |
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FAQ
Which is cheaper, GPT-6.1 Terra or Step 5 Preview?
Step 5 Preview is 29% cheaper than GPT-6.1 Terra on a typical 3:1 input/output mix.
GPT-6.1 Terra vs Step 5 Preview: which has a bigger context window?
GPT-6.1 Terra: 1,050,000 tokens. Step 5 Preview: 1,048,576 tokens.
How much would 1 million requests cost?
At 2,000 input + 500 output tokens per request: GPT-6.1 Terra ≈ $4,500, Step 5 Preview ≈ $3,350.
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