the model directory

Gemini Robotics-ER 2 Preview vs GPT OSS 20B

compare api pricing, context windows, and capabilities side by side.

use the same workload to understand the cost before choosing a model.

prices are published impossibl api usage rates in usd. compare the billing units and context tiers alongside each price. unpublished capabilities are marked explicitly.

model pricing, capabilities, context limits, and retirement dates
specification	Gemini Robotics-ER 2 Preview google/gemini-robotics-er-2-preview	GPT OSS 20B openai/gpt-oss-20b
creator	Google	OpenAI
model type	Text generation	Text generation
input modalities	text, image, audio, video	text
output modalities	text	text
base input price	$2.00 / 1m tokens	$0.075 / 1m tokens
base output price	$10.00 / 1m tokens	$0.30 / 1m tokens
cached input price	$0.20 / 1m tokens	$0.0375 / 1m tokens
context window	131.07k tokens	128k tokens
tool calling	not published	not published
context pricing tiers	none published	none published
endpoints	/v1/chat/completions	/v1/chat/completions
retirement	not announced	not announced

estimate your api cost

estimate text token usage across the same workload. all amounts are in usd.

input tokens / request

total input, including cached tokens

output tokens / request

include billable reasoning tokens

number of requests

the same token usage in each request

cached input / request

a subset of total input, never additional tokens

Gemini Robotics-ER 2 Preview

$7.00

estimated usage cost

1,000 requests × (1,000 uncached input × $2.00 + 500 output × $10.00) / 1,000,000 = $7.00

base rates; no context pricing tiers are published.

GPT OSS 20B

$0.225

estimated usage cost

1,000 requests × (1,000 uncached input × $0.075 + 500 output × $0.30) / 1,000,000 = $0.225

base rates; no context pricing tiers are published.

estimates use published impossibl api usage rates. configured billing adjustments, funding fees, taxes, and custom workspace rates are excluded and may change the final amount.

image and audio usage, cache creation, and additional tool charges are excluded. reasoning tokens count as billable output, even when they are not visible in the response.

Gemini Robotics-ER 2 Preview vs GPT OSS 20B: side-by-side summary

Gemini Robotics-ER 2 Preview and GPT OSS 20B are available through the Impossibl API. They share the /v1/chat/completions endpoint. Set the model identifier to select the model for a supported request.

Gemini Robotics-ER 2 Preview is created by Google. It has a 131,072-token context window. Base API pricing (USD): $2.00 per million input tokens; $10.00 per million output tokens.

GPT OSS 20B is created by OpenAI. It has a 128,000-token context window. Base API pricing (USD): $0.075 per million input tokens; $0.30 per million output tokens.

context window

Gemini Robotics-ER 2 Preview: 131,072 tokens
GPT OSS 20B: 128,000 tokens

price

Gemini Robotics-ER 2 Preview: Base API pricing (USD): $2.00 per million input tokens; $10.00 per million output tokens.
GPT OSS 20B: Base API pricing (USD): $0.075 per million input tokens; $0.30 per million output tokens.

created by

Gemini Robotics-ER 2 Preview: Google
GPT OSS 20B: OpenAI