OpenAI

gpt-oss-20B

Estimated pricingMedium memory

gpt-oss-20B is OpenAI's medium-memory model. This page shows current pricing, an interactive cost calculator, and a side-by-side with similar models.

Input

$0.20/1M tokens

Output

$0.60/1M tokens

Cached

—

Batch

—

Interactive

Calculate your gpt-oss-20B bill.

Adjust the workload below and watch the monthly cost update in real time.

What would gpt-oss-20B cost you?

Adjust the workload to see your monthly bill.

1,00010,00050,000250,0001M10M

Technical specifications

gpt-oss-20B at a glance.

Memory

128,000

tokens

Max reply

16,384

tokens

Memory tier

Medium

a long report or a codebase file

Tokenizer

tiktoken-o200k

Released

—

Training cutoff

—

Availability

Estimated

Status

active

What it can do

Capabilities & limits.

  • Understands images
  • Deep step-by-step thinking
  • Uses tools / calls functions
  • Strict JSON output
  • Streams replies
  • Fine-tunable on your data

When to pick gpt-oss-20B

  • High-volume workloads where unit cost matters.

When to look elsewhere

  • Your workload involves images — pick a vision-capable model instead.
  • You need tool-use / function calling for agent workflows.

Alternatives

Similar models to compare.

FAQ

gpt-oss-20B — the questions we see most.

Pricing, capabilities, alternatives — generated from the same data that powers the calculator above.

Get instant answers from our AI agent

At a typical workload of 50,000 conversations a month with 1,500-token prompts and 800-token replies, gpt-oss-20B costs roughly $39 per month. Input is $0.20 /1M tokens and output is $0.60 /1M tokens.
gpt-oss-20B has a 128,000-token context window (medium memory — a long report or a codebase file). That means you can fit about 24,000 words of input and history in a single call.
Models in a similar class include GPT-4o mini, GPT-4.1 nano, GPT-5 nano. The "Similar models" section below this FAQ links into each.
Open-weight model — price from a common hosting provider (Together, Fireworks, Replicate). We source estimates from the cheapest public hosting provider for that model and note it on the page.

Still unsure?

Compare gpt-oss-20B against 100+ other models.

Open the full wizard — pick a use case, set your usage, and see side-by-side monthly costs in under a minute.

Open the comparison wizardBook a call