Models/Claude Sonnet 5.5 (Max, Default Fallback)

Claude Sonnet 5.5 (Max, Default Fallback)Ready

claude-sonnet-5-5

Serverless APILLMReasoningVisionPrompt cachingClosed

The balanced workhorse of the Claude 5.5 family — near-frontier reasoning at a fraction of flagship pricing. It ranks #2 of the top 20 frontier models on the Artificial Analysis Intelligence Index with a score of 56.0. Released September 28, 2026.

Context

—

Parameters

Intelligence rank · 56.0

Closed

Weights

View full spec

ReleasedSep 28, 2026

Knowledge cutoff—

Size classlarge

Input modalitiestext, image

Output modalitiestext

Median output speed141 tok/s

Median time to first token471.4s

Usage guide

1. Choose how you'd like to use Claude Sonnet 5.5 (Max, Default Fallback)

☁️ Serverless

Use with pay-per-token pricing. Zero setup, no cold starts, automatic failover between upstream routes.

Usage tiers · Standard • Priority

Try it — sign in

curl https://tokenhub-staging.coality.io/v1/chat/completions \
  -H "Authorization: Bearer $TOKEN_HUB_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "claude-sonnet-5-5",
    "messages": [{"role": "user", "content": "Explain vector databases in one paragraph"}]
  }'

Pricing

Bucket	Price	Notes
Input tokens	$2.50	per 1M tokens
Output tokens	$12.50	per 1M tokens
Cache read	$0.1250	cached input · 95% off
Cache write	$3.13	per 1M tokens

Billed per token with micro-dollar precision · effective Oct 26, 2026 · default key limits 600 req/min · 200K tokens/min

Benchmarks

Humanity's Last Exam

55.0

SciCode

61.0

Terminal-Bench 4.0

63.6

Long Context Reasoning

82.7

Frontier Code

45.8

Scores from the Artificial Analysis evaluation suite (0–100 scale).

About this model

Closed model, with a 1M context window, native image input, visible reasoning traces, prompt caching at a 95% discount on cached input, 141 output tokens/s median serving speed and 471.4s to first token.