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Claude Opus 4.8 vs Gemini Robotics-ER 2 Preview

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 unpublished capabilities are marked explicitly.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
specificationClaude Opus 4.8

anthropic/claude-opus-4-8

Gemini Robotics-ER 2 Preview

google/gemini-robotics-er-2-preview

creatorAnthropicGoogle
model typeText generationText generation
input modalitiestext, imagetext, image, audio, video
output modalitiestexttext
base input price$5.00 / 1m tokens$2.00 / 1m tokens
base output price$25.00 / 1m tokens$10.00 / 1m tokens
cached input price$0.50 / 1m tokens$0.20 / 1m tokens
cache creation price$6.25 / 1m tokensnot published
1h cache creation price$10.00 / 1m tokensnot published
context window1m tokens131.07k tokens
tool callingnot publishednot published
context pricing tiersnone publishednone published
endpoints
  • /v1/chat/completions
  • /v1/chat/completions
retirementnot announcednot announced

estimate your api cost

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

token workload

total input, including cached tokens

include billable reasoning tokens

the same token usage in each request

a subset of total input, never additional tokens

Claude Opus 4.8

$17.50

estimated usage cost

1,000 requests × (1,000 uncached input × $5.00 + 500 output × $25.00) / 1,000,000 = $17.50

base rates; no context pricing tiers are published.

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.

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.

Claude Opus 4.8 vs Gemini Robotics-ER 2 Preview: side-by-side summary

Claude Opus 4.8 and Gemini Robotics-ER 2 Preview 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.

Claude Opus 4.8 is created by Anthropic. It has a 1,000,000-token context window. Base API pricing (USD): $5.00 per million input tokens; $25.00 per million output tokens.

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.

context window

  • Claude Opus 4.8: 1,000,000 tokens
  • Gemini Robotics-ER 2 Preview: 131,072 tokens

price

  • Claude Opus 4.8: Base API pricing (USD): $5.00 per million input tokens; $25.00 per million output tokens.
  • Gemini Robotics-ER 2 Preview: Base API pricing (USD): $2.00 per million input tokens; $10.00 per million output tokens.

created by

  • Claude Opus 4.8: Anthropic
  • Gemini Robotics-ER 2 Preview: Google