SSyncDev

AI model comparison

Claude Sonnet 5.5 vs Gemini 3.8 Flash

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

Document formats, effort and operating cost

The choice depends partly on the input your application needs. Gemini records audio, video and PDF input, while Sonnet's documented model modalities are text and images. Tool integration and thinking controls also belong to different API contracts.

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 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 ↗
VS

Google

Gemini 3.8 Flash

Gemini 3.8 Flash is Google's multimodal reasoning model for coding, tool-driven applications and document work. It accepts text, images, audio, video and PDFs, and produces text.

Context
1.05M
Max output
65.54K
Input / 1M tokens
$0.75
Output / 1M tokens
$3.75

Accepts

  • Text input
  • Image input
  • Audio input
  • Video input
  • PDF input

Produces

  • Text output
Full model profileai.google.dev ↗

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

  • Maximum output: 128K

Gemini 3.8 Flash

  • Context capacity: 1.05M
  • Input price: $0.75
  • Output price: $3.75

Context capacity

Higher listed limit

Claude Sonnet 5.5:1M

Gemini 3.8 Flash:1.05M

Gemini 3.8 Flash

Maximum output

Higher listed limit

Claude Sonnet 5.5:128K

Gemini 3.8 Flash:65.54K

Claude Sonnet 5.5

Input price

Lower listed token rate

Claude Sonnet 5.5:$2.00

Gemini 3.8 Flash:$0.75

Gemini 3.8 Flash

Output price

Lower listed token rate

Claude Sonnet 5.5:$10.00

Gemini 3.8 Flash:$3.75

Gemini 3.8 Flash

Specifications

Pricing, limits and capabilities

Specifications for Claude Sonnet 5.5 and Gemini 3.8 Flash. Higher limits and lower prices describe these figures only.
SpecificationClaude Sonnet 5.5Gemini 3.8 Flash
ProviderAnthropicGoogle
Listed pricing routeAnthropicGoogle Gemini API
Model familyClaude 5Gemini 3
Accepted inputstext, imagetext, image, audio, video, pdf
Produced outputstexttext
Context window1M1.05MHigher
Max output128KHigher65.54K
Input price / 1M$2.00$0.75Lower
Output price / 1M$10.00$3.75Lower
Reasoning modeDocumentedDocumented
Tool callingDocumentedDocumented
Image inputDocumentedDocumented
Audio inputNot documentedDocumented
Structured outputDocumentedDocumented
LicenseProvider termsProvider terms

Workload guidance

Which model should you choose?

A useful decision test

Use actual files and the same acceptance criteria. Measure whether relevant facts survive, whether unknown information stays unknown and whether tool actions use the right arguments. Separate publisher token prices from preprocessing, caching and grounding costs when estimating the workflow.

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.

Compare a different pair

Search by model or provider to explore another comparison.

Open model comparison