GPT-5.5 Pro vs Claude Sonnet 4.6

GPT-5.5 Pro from OpenAI and Claude Sonnet 4.6 from Anthropic are shown side by side so you can compare pricing, model IDs, context and output limits, modalities, tool use, release details, and benchmark results where data is available.

Overall Recommendation

Claude Sonnet 4.6 is the balanced production default at one-tenth of GPT-5.5 Pro’s input price and one-twelfth of its output price. Choose GPT-5.5 Pro only for quality-maximized professional tasks where cost is secondary.

Comparison Highlights

Based On Current Page Data

GPT-5.5 ProOpenAI

Claude Sonnet 4.6Anthropic

How To Read It

Best For

Highest-difficulty professional reasoningdeliverables

Balanced codingagentsproduction knowledge work

How To Read ItUse-case synthesis from model capabilities and positioning.

Workload Fit

Pro reasoningCodingResearch

CodingAgentsProduction

How To Read ItThe workloads each model is most directly shaped for.

Input

$30/M

$3/MEdge

How To Read ItLower is better when prompts or retrieval payloads are large.

Output

$180/M

$15/MEdge

How To Read ItLower is better for reasoning-heavy or long-generation traffic.

Context length

1.1M

How To Read ItHigher is better for repositories, retrieval packs, and transcripts.

Input modalities

Image, PDF, Text

How To Read ItBroader input support reduces the need for separate vision or video models.

Model Selection Guide

GPT-5.5 ProOpenAI

Choose GPT-5.5 Pro When

TokenHub positions it as the high-compute GPT-5.5 tier for the hardest professional tasks
$30 input and $180 output per million tokens, prioritizing answer quality over cost
A 1.05M context window, 128K maximum output, and text, image, and PDF input

Claude Sonnet 4.6Anthropic

Choose Claude Sonnet 4.6 When

A 47.2 Intelligence Index and 50.9 Coding Index in TokenHub’s max-effort profile
$3 input and $15 output per million tokens
A 1M context window, 64K maximum output, and text, image, and PDF input

Basic Information

GPT-5.5 ProOpenAI

Claude Sonnet 4.6Anthropic

Name

GPT-5.5 Pro

Model id

gpt-5.5-pro

Intro

GPT-5.5 Pro is the higher-compute variant of OpenAI’s GPT-5.5 generation, intended for the hardest professional tasks where answer quality matters more than speed. OpenAI materials describe the Pro tier as thinking harder for greater precision across coding, research, data analysis, and document-heavy work. It should be positioned for difficult reasoning and professional-grade deliverables rather than routine chat.

Author

OpenAI

Released date

2026-04-23

Context length

1.1M

Max output tokens

128K

Name

Claude Sonnet 4.6

Model id

claude-sonnet-4.6

Intro

Claude Sonnet 4.6 is presented as a broad upgrade for coding, computer use, long-context reasoning, agent planning, knowledge work, and design. Anthropic materials describe it as a strong middle tier with 1M-context beta support and better agent behavior. It is suited to teams that want near-frontier capability with more practical cost and latency than Opus.

Author

Anthropic

Released date

2026-02-17

Context length

Max output tokens

64K

Name

GPT-5.5 Pro

Name

Claude Sonnet 4.6

Model id

gpt-5.5-pro

Model id

claude-sonnet-4.6

Intro

Author

OpenAI

Author

Anthropic

Released date

2026-04-23

Released date

2026-02-17

Context length

1.1M

Context length

Max output tokens

128K

Max output tokens

64K

Pricing

GPT-5.5 ProOpenAI

Claude Sonnet 4.6Anthropic

Input

$30/M

Output

$180/M

Cached input

n/a

Input

$3/M

Output

$15/M

Cached input

$0.3/M

Input

$30/M

Input

$3/M

Output

$180/M

Output

$15/M

Cached input

n/a

Cached input

$0.3/M

Capabilities

GPT-5.5 ProOpenAI

Claude Sonnet 4.6Anthropic

Reasoning

Knowledge

2025-12-01

Attachment

Input modalities

Image, PDF, Text

Output modalities

Text

Temperature

Tool use

Reasoning

Knowledge

2025-08-31

Attachment

Input modalities

Image, PDF, Text

Output modalities

Text

Temperature

Tool use

Reasoning

Knowledge

2025-12-01

Knowledge

2025-08-31

Attachment

Input modalities

Image, PDF, Text

Input modalities

Image, PDF, Text

Output modalities

Text

Output modalities

Text

Temperature

Tool use

Benchmark

GPT-5.5 ProOpenAINo benchmark data

Claude Sonnet 4.6Anthropic

Intelligence

n/a

Coding

n/a

Intelligence

wins47.2

Coding

wins50.9

Knowledge & Reasoning

GPQA

n/a

HLE

n/a

GPQA

wins87.5%

HLE

wins30%

Coding

SciCode

n/a

Terminal-Bench Hard

n/a

SciCode

wins46.8%

Terminal-Bench Hard

wins53.0%

Instruction Following & Agent Tasks

IFBench

n/a

AA-LCR

n/a

Tau2

n/a

IFBench

wins56.6%

AA-LCR

wins70.7%

Tau2

wins75.7%

FAQ

Which model is better, GPT-5.5 Pro or Claude Sonnet 4.6?

GPT-5.5 Pro and Claude Sonnet 4.6 should be compared by workload. This page places price, context, output limits, capabilities, and benchmark data side by side. It is also relevant to: claude vs chatgpt, claude ai vs chatgpt, chatgpt vs claude comparison, chat gpt vs claude.

Is Claude Sonnet 4.6 cheaper than GPT-5.5 Pro?

Use the pricing rows above to compare input, output, and cached input prices for GPT-5.5 Pro and Claude Sonnet 4.6.

Which model supports a longer context length?

GPT-5.5 Pro lists 1.1M context length, while Claude Sonnet 4.6 lists 1M.

Can I access both models through TokenHub?

If both models are available in the TokenHub catalog, you can route requests to GPT-5.5 Pro and Claude Sonnet 4.6 through the TokenHub API.