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  1. Home
  2. /
  3. Compare

Claude Opus 5.5 vs Ember-1

Compare Claude Opus 5.5 from Anthropic and Ember-1 from Fireworks AI on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the OpenRouter API.

Favicon for anthropic
Claude Opus 5.5
Favicon for fireworks
Ember-1
Favicon for anthropic
Claude Opus 5.5
Favicon for fireworks
Ember-1

Overview

Claude Opus 5.5
Author
Anthropic
Ember-1
Author
Fireworks AI
Claude Opus 5.5
Context length
1Mtokens
Ember-1
Context length
1.05Mtokens
Claude Opus 5.5
Reasoning
Ember-1
Reasoning
Claude Opus 5.5
Input modalities
Ember-1
Input modalities
Claude Opus 5.5
Output modalities
Ember-1
Output modalities

Claude Opus 5.5 vs Ember-1: side-by-side summary

Claude Opus 5.5 and Ember-1 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Claude Opus 5.5, from Anthropic, has a 1,000,000-token context window and is priced at $4/M tokens input, $20/M tokens output on OpenRouter.

Ember-1, from Fireworks AI, has a 1,048,576-token context window and is priced at $3/M tokens input, $15/M tokens output on OpenRouter.

Context window
  • Claude Opus 5.5: 1,000,000 tokens
  • Ember-1: 1,048,576 tokens
Price
  • Claude Opus 5.5: $4/M tokens input, $20/M tokens output
  • Ember-1: $3/M tokens input, $15/M tokens output
Provided by
  • Claude Opus 5.5: Anthropic
  • Ember-1: Fireworks AI
  • Claude Opus 5.5 model details, providers and pricing
  • Ember-1 model details, providers and pricing

Claude Opus 5.5 vs Ember-1 at a glance

Claude Opus 5.5 vs Ember-1 comparison
AttributeClaude Opus 5.5Ember-1
Input price$4/M tokens$3/M tokens
Output price$20/M tokens$15/M tokens
Context window1,000,000 tokens1,048,576 tokens
Intelligence Index57.6Not available
Coding IndexNot availableNot available
Agentic IndexNot availableNot available
Latency (p50)3.99 s0.96 s
Throughput (p50)92.0 tok/s53.5 tok/s

Benchmark data updated Oct 5, 2026

Frequently asked questions

Is Claude Opus 5.5 cheaper than Ember-1?

Ember-1 is cheaper than Claude Opus 5.5 on OpenRouter: Ember-1 costs $3/M tokens input and $15/M tokens output, while Claude Opus 5.5 costs $4/M tokens input and $20/M tokens output.

Which has the longer context window, Claude Opus 5.5 or Ember-1?

Ember-1 has the longer context window at 1,048,576 tokens, compared with 1,000,000 tokens for Claude Opus 5.5.

Which is faster, Claude Opus 5.5 or Ember-1?

Claude Opus 5.5 is faster on OpenRouter, generating a median 92.0 tokens per second compared with 53.5 tokens per second for Ember-1.