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Claude Sonnet 5.5

Also accepted:claude-sonnet-5-5claude-sonnet-5.5anthropic/claude-sonnet-5-5anthropic/claude-sonnet-5.5
Anthropic
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Anthropic's Claude Sonnet 5.5 is the successor to Claude Sonnet 5 — the best combination of speed and intelligence in the lineup. It is the direct upgrade for well-scoped everyday work (building features, fixing bugs, drafting and review) at the same $2 / $10 per million input / output rates, with adaptive thinking on by default at `high` effort, 1M-token context, 128K max output, vision input, and tool use. Faster than Opus 5.5, cheaper, same window.

Providers
Capabilities
Anthropic
anthropic-byok
$0
$0
$0
$0
Unavailable
OpenRouter
openrouter-byok
$0
$0
$0
—
Unavailable
Cline
cline-byok
$0
$0
—
—
Unavailable
Usage analytics

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API & code
Uptime & Health
No uptime data yet

These providers haven't been health-probed for this model yet. The router still routes around upstreams that fail live requests — uptime fills in once probe history accrues.

Share cards
Claude Sonnet 5.5 share card
Claude Sonnet 5.5
Anthropic upstream share card
Anthropic upstream
OpenRouter upstream share card
OpenRouter upstream
Cline upstream share card
Cline upstream
Credits
Use your own key

Run Claude Sonnet 5.5 on your own key — your requests are billed by the provider. Pool callers pay AnyRouter credits.

No BYOK keys configured for this model yet.

Share a key with the pool to earn credits for every request it serves, covering your plan cost.

Text generation
Context length1,000,000 tokens
Max output128,000 tokens
ArchitectureTransformer
Categorytext
ReleasedSep 28, 2026
Modalities
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