Anthropic · in Borg

Claude Sonnet 4.6

Claude Sonnet 4.6 is a 4.x-generation general-purpose model that improved on Sonnet 4.5 in coding, computer use, long-context reasoning, and agent planning.

Reasoning1,000,000 tokenstext, image

1,000,000 tokensContext window

1561 msMedian time to first token (gateway proxy)

46.4Output tokens per second (whole turn)

$3 / $15Vendor API price in / out · per 1M

Included in Borg

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At a glance

Specification	Value
Provider	Anthropic
Family	Claude
Release date	2026-02-17 Vendor source
Context window	1,000,000 tokens Vendor source
Input modalities	text, image
Output modalities	text
Reasoning	Yes
Open weights	No
Knowledge cutoff	2025-08 Vendor source
Borg lane ids	`antigravity/claude-sonnet-4-6`
Versions in Borg	Claude Sonnet 4.6 · Claude Sonnet 5.5
Median time to first token (gateway proxy) on Borg	1561 ms
Median tokens per second (end to end) on Borg	46.4 output tokens per second

Not published by the vendor: thinking modes, fusion roles.

What Claude Sonnet 4.6 is good for

Claude Sonnet 4.6 is a 4.x-generation general-purpose model that improved on Sonnet 4.5 in coding, computer use, long-context reasoning, and agent planning. It brings some tasks once reserved for an Opus-class model into a smaller tier, while Opus 4.6 remains the heavier choice for the most demanding work. Anthropic now labels Sonnet 4.6 legacy and points users toward Sonnet 5.5, which has lower published base token prices. Sonnet 4.6 can still be valuable for existing prompts and automation tested against its particular behavior, including browser or office-software workflows. Its adaptive thinking and large context also suit multi-file coding and document synthesis. Borg includes Sonnet 4.6 in the subscription; Borg Fusion can route to it, or you can pick its lane directly when reproducibility across sessions matters.

computer-use workflows in office applications
multi-file code changes with existing prompts
long-context document synthesis
regression comparisons against newer Sonnet versions

How Borg uses it

Claude Sonnet 4.6 is available as a subscription catalog lane in Borg. The catalog does not publish which Fusion profiles route to this model, so no routing role is claimed here. You can pick it directly by setting the OpenAI-compatible gateway model field to a listed lane id. Check the current catalog for availability before building a workflow around a lane.

model: "antigravity/claude-sonnet-4-6"

Measured on Borg

Metric	Median	95th percentile	Samples
Time to first token (gateway proxy)	1561 ms	4320 ms	1626
Tokens per second (end to end)	46.4 output tokens per second	70.2 output tokens per second	53610

Time to first token (gateway proxy)

Lower is fasterFleet median 3971.5 ms

Claude Sonnet 4.61561 ms

Output tokens per second (whole turn)

Higher is fasterFleet median 31.9 tokens/s

Claude Sonnet 4.646.4 tokens/s

Time to first token (gateway proxy): time until the first streamed response event reaches the gateway; our closest available measure of time to first token
Tokens per second (end to end): tokens per second, end to end: provider-reported output tokens divided by the whole turn's elapsed time, including queueing and reasoning; not a streaming per-token rate

Completion speed covers the whole turn including queueing and reasoning time; it is not a streaming tokens-per-second figure.

Measured on Borg: SearchAtlas AI Gateway production request logs. 30-day window ending 2026-10-08; 130584 requests. Minimum 100 samples per published request metric.

Benchmarks

Benchmark	Vendor-reported score	Source
Terminal-Bench 2.0	59.1%	Vendor source
SWE-bench Verified	79.6%	Vendor source
OSWorld-Verified	72.5%	Vendor source
MCP-Atlas	61.3%	Vendor source
GPQA Diamond	89.9%	Vendor source

Pricing

Included in Borg subscription. Vendor API list price: $3 input / $15 output per 1M tokens. Vendor price source.

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FAQ

What is Claude Sonnet 4.6?

Claude Sonnet 4.6 is listed in Borg's subscription catalog as antigravity/claude-sonnet-4-6. Claude Sonnet 4.6 is a 4.x-generation general-purpose model that improved on Sonnet 4.5 in coding, computer use, long-context reasoning, and agent planning.

Is Claude Sonnet 4.6 in Borg?

Yes. Claude Sonnet 4.6 is listed in Borg's subscription catalog under the lane antigravity/claude-sonnet-4-6. You can choose the lane directly, or explore the available Fusion profiles. Availability and model details can change; check the current catalog before deployment.

What context window does Claude Sonnet 4.6 have?

The published context window is 1,000,000 tokens. Consult the cited sources for details and current limits. Vendor source

Is Claude Sonnet 4.6 good for coding?

Vendor-published evaluations appear in the benchmarks section; their settings may differ from your tasks. Its listed uses include computer-use workflows in office applications, multi-file code changes with existing prompts, long-context document synthesis, regression comparisons against newer Sonnet versions. Try the lane for your own tasks, and compare the output with your requirements before choosing a default.

How fast is Claude Sonnet 4.6 on Borg?