GPT-6.1 Terra Pro vs Step 5 Preview

Price, context window & benchmark comparison

GPT-6.1 Terra Pro

OpenAI

$1.00 / $5.00

Input / Output · per 1M tokens

Step 5 Preview

StepFun

$1.00 / $2.70

Input / Output · per 1M tokens

Compare different models

Verdict: Step 5 Preview is 29% cheaper than GPT-6.1 Terra Pro on a typical 3:1 input/output mix. GPT-6.1 Terra Pro has the larger context window (1.1M vs 1M).

	GPT-6.1 Terra Pro	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	—	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	—	—

Cost calculator

Input tokens / requestOutput tokens / requestRequests / day

FAQ

Which is cheaper, GPT-6.1 Terra Pro or Step 5 Preview?

Step 5 Preview is 29% cheaper than GPT-6.1 Terra Pro on a typical 3:1 input/output mix.

GPT-6.1 Terra Pro vs Step 5 Preview: which has a bigger context window?

GPT-6.1 Terra Pro: 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 Pro ≈ $4,500, Step 5 Preview ≈ $3,350.

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