GPT-6.1 Terra vs gpt-oss-20b

Price, context window & benchmark comparison

OpenAI

GPT-6.1 Terra

OpenAI
$1.00 / $5.00
Input / Output · per 1M tokens
VS
OpenAI

gpt-oss-20b

OpenAI
$0.03 / $0.13
Input / Output · per 1M tokens
Compare different models
OpenAI
OpenAI
Verdict: gpt-oss-20b is 36.4× cheaper than GPT-6.1 Terra on a typical 3:1 input/output mix. GPT-6.1 Terra has the larger context window (1.1M vs 131K).
GPT-6.1 Terragpt-oss-20b
Input price / 1M$1.00$0.03
Output price / 1M$5.00$0.13
Blended price (3:1)$2.00$0.055
Cached input / 1M$0.05$0.03
Context window1.1M131K
Max output128K118K
Intelligence index51.3—
Coding index—20.7
Providers7—
Best provider uptime (30m)100.0%—
Vision inputYesNo
ReasoningYesYes
Tool callingYesYes
Released2026-10-262025-08-05
Retirement——

Cost calculator

FAQ

Which is cheaper, GPT-6.1 Terra or gpt-oss-20b?

gpt-oss-20b is 36.4× cheaper than GPT-6.1 Terra on a typical 3:1 input/output mix.

GPT-6.1 Terra vs gpt-oss-20b: which has a bigger context window?

GPT-6.1 Terra: 1,050,000 tokens. gpt-oss-20b: 131,072 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: GPT-6.1 Terra ≈ $4,500, gpt-oss-20b ≈ $125.00.

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