SSyncDev

AI model comparison

Claude Opus 5.5 vs Claude Sonnet 5.5

Compare pricing, context limits, supported inputs and deployment options to choose a model for your workflow.

Complex agent work versus everyday tasks

Both Claude models support text and image input with text output. Opus and Sonnet have different base token rates and thinking defaults, so an evaluation should record the effort settings. Their equal context limits describe input capacity rather than equal task behavior.

Read the recorded specifications

The table below shows each profile's documented interface and recorded limits. Missing prices or measurements remain unknown. Open the source links on each profile to confirm the current checkpoint or API route.

Side-by-sideCapabilities and practical differences

Anthropic

Claude Opus 5.5

Claude Opus 5.5 is an Anthropic language model that accepts text and images and returns text.

Context
1M
Max output
128K
Input / 1M tokens
$4.00
Output / 1M tokens
$20.00

Accepts

  • Text input
  • Image input

Produces

  • Text output
Full model profileplatform.claude.com ↗
VS

Anthropic

Claude Sonnet 5.5

Claude Sonnet 5.5 is an Anthropic language model that accepts text and images and returns text.

Context
1M
Max output
128K
Input / 1M tokens
$2.00
Output / 1M tokens
$10.00

Accepts

  • Text input
  • Image input

Produces

  • Text output
Full model profileplatform.claude.com ↗

At a glance

Key differences

Compare the available figures below, then try both models on the work you need to do.

Claude Sonnet 5.5

  • Input price: $2.00
  • Output price: $10.00

Context capacity

Higher listed limit

Claude Opus 5.5:1M

Claude Sonnet 5.5:1M

Same value

Maximum output

Higher listed limit

Claude Opus 5.5:128K

Claude Sonnet 5.5:128K

Same value

Input price

Lower listed token rate

Claude Opus 5.5:$4.00

Claude Sonnet 5.5:$2.00

Claude Sonnet 5.5

Output price

Lower listed token rate

Claude Opus 5.5:$20.00

Claude Sonnet 5.5:$10.00

Claude Sonnet 5.5

Specifications

Pricing, limits and capabilities

Specifications for Claude Opus 5.5 and Claude Sonnet 5.5. Higher limits and lower prices describe these figures only.
SpecificationClaude Opus 5.5Claude Sonnet 5.5
ProviderAnthropicAnthropic
Listed pricing routeAnthropicAnthropic
Model familyClaude 5Claude 5
Accepted inputstext, imagetext, image
Produced outputstexttext
Context window1M1M
Max output128K128K
Input price / 1M$4.00$2.00Lower
Output price / 1M$20.00$10.00Lower
Reasoning modeDocumentedDocumented
Tool callingDocumentedDocumented
Image inputDocumentedDocumented
Audio inputNot documentedNot documented
Structured outputDocumentedDocumented
LicenseProvider termsProvider terms

Workload guidance

Which model should you choose?

A useful decision test

Test everyday issues separately from the most difficult multi-step work. Count accepted patches or completed documents, then measure review time and retries. A routing policy can assign a modest task to one model and escalate only the cases that fail clear checks.

Inspect the first model profile and the second model profile. Keep your test inputs, runtime settings and acceptance criteria with the result so the comparison can be repeated.

Documentation and model profiles

Explore each model’s features, API requirements and licence terms in the sources below.

Questions people ask

It brings together documented inputs and outputs, token limits, deployment terms and available pricing. When both models have source-linked, verified results on a shared benchmark, those results are shown with their individual sources. The comparison is a starting point for evaluating your own workload.

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