Claude Sonnet 5.5

The successor to Sonnet 5 in Anthropic's Claude 5.5 family, which Anthropic positions as its balance of speed and intelligence, with adaptive thinking on by default.

Context: 1M tokens
Max output: 128K
Cutoff: Jun 2026
Released: Sep 2026

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Hosted API price

List price via Anthropic · per 1M tokens

USD

Input: $2.00 /1M
Output: $10.00 /1M
Hosted by: 2 providers

Hosted API pricing

How we price

Order

Providers are listed cheapest input rate first, then by output rate, a tie going to the creator's own listing. A provider that lists the model without a published rate sits at the end.

Prices

Base-tier, on-demand rates in USD per 1M tokens, converted at ECB reference rates where a provider publishes in another currency. Cached-input and batch rates show only where a provider publishes them. "Cheapest" marks the one provider with the lowest input and output pair; a tie wears no badge.

Cost

Input rate times the input tokens plus output rate times the output tokens, at the monthly volume set above the table. Cached-input, batch, long-context and reasoning-token billing are not modelled.

Transparency and funding

Affiliates: Affiliate links are marked. We may earn a commission if you click them, but commissions never affect the order.

Every provider serving Claude Sonnet 5.5, cheapest input first. Set your monthly volume to see what each would bill.

Input M Output M

Every provider serving Claude Sonnet 5.5, with its price per 1M input and output tokens and what the volume above would cost
Provider	Input /1M	Output /1M	Cached input /1M	Cost at 10M in + 2M out	Link
Anthropic Creator	$2.00	$10.00	$0.20	$40.00	Visit website
DigitalOcean	$2.00	$10.00	$0.20	$40.00	Visit website

Heads up: Base-tier, on-demand rates per 1M tokens; cached, batch and long-context tiers excluded. A provider may serve a shorter context or a quantized build than the creator's release. Verify before provisioning. More on how we price.

Similarly priced models

The models nearest Claude Sonnet 5.5 by blended rate, each at its own cheapest provider.

Models priced nearest Claude Sonnet 5.5 per 1M tokens, each at its cheapest provider
Model	Blended /1M	Input /1M	Output /1M	Context	Cutoff	vs Claude Sonnet 5.5
GPT-5.1 OpenAI	$2.7083	$1.25	$10.00	400K	Sep 2024	−19%
Gemini 3.5 Flash Google Cloud	$2.75	$1.50	$9.00	1M		−17%
GPT-4.1 OpenAI	$3.00	$2.00	$8.00	1M	Jun 2024	−10%
o3 OpenAI	$3.00	$2.00	$8.00	200K	Jun 2024	−10%
Claude Sonnet 5 Anthropic	$3.3333	$2.00	$10.00	1M	Jan 2026	0%
Claude Sonnet 5.5 This model Anthropic	$3.3333	$2.00	$10.00	1M	Jun 2026
GPT-5.6 Sol OpenAI	$3.3333	$2.00	$10.00	1M	Feb 2026	0%
GPT-6 Sol OpenAI	$3.3333	$2.00	$10.00	1M	Apr 2026	0%
Gemini 3.1 Pro Preview Google Cloud	$3.6667	$2.00	$12.00	1M	Jan 2025	+10%
GPT-5.6 Terra OpenAI	$3.6667	$2.00	$12.00	1M	Feb 2026	+10%
Kimi K3 Moonshot AI	$3.6667	$2.00	$12.00	1M		+10%

USD per 1M tokens at each model's cheapest listed provider. Blended is the cost of 10M input plus 2M output tokens, spread over the 12M.

Salad

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Pick a priority level to balance cost against interruptions

Per-second billing, with no charge for cold starts or image pulls

View Pricing

Capabilities

What Claude Sonnet 5.5 accepts and can do, as published by Anthropic.

Text Accepts and generates natural-language text.
Image Accepts images as input alongside text.
Reasoning Thinks before it answers, always on or as a switchable mode.
Function calling Connect to external tools, APIs, and systems.
Structured output Return responses in structured formats like JSON.
Web search Search the web for up-to-date information.
Code execution Write and execute code in a sandboxed environment.
File upload Process uploaded documents, spreadsheets, and other files.
MCP Connect to services via Model Context Protocol.

Common questions

What is Claude Sonnet 5.5 good for?

Coding, agents and multistep tool use where response time matters, with thinking depth set by an effort control. It takes text and images, in the middle of Anthropic's price range, below Opus 5.5.

When is Claude Sonnet 5.5 not a good fit?

Audio or video input, and closed weights, so no self-hosting. Code that disables thinking or forces a tool call needs changes, since both return an error on this model.

What is the cheapest way to run Claude Sonnet 5.5?

The cheapest hosted rate is $2.00 / $10.00 per 1M tokens via Anthropic.

How does Claude Sonnet 5.5 compare with Claude Sonnet 5?

Anthropic says Claude Sonnet 5.5 is faster than Claude Sonnet 5 and needs fewer tokens for the same work, writes more clearly, and is stronger at agentic coding, long-horizon work and image understanding. Forced tool use now returns an error. Same price, 1M-token context and text and image input. Claude Sonnet 5.5 came out 3 months later and has a newer knowledge cutoff (June 2026 against January 2026).

Can I self-host Claude Sonnet 5.5?

No. Anthropic does not publish the weights; Claude Sonnet 5.5 is available only through hosted APIs.