Claude Sonnet 4.6DeepSeek V4 Pro 0813v = reported by the model’s maker. — = no public score yet. Arena bars span the range across every model we grade.
What it costs you
Drag to match your monthly usage.
Claude Sonnet 4.6$1,200 /month
DeepSeek V4 Pro 0813$364 /month
DeepSeek V4 Pro 0813 saves you $836 a month at this usage, $10,032 a year.
At a glance
Attribute
Claude Sonnet 4.6
DeepSeek V4 Pro 0813
Made by
Anthropic
DeepSeek
Availability
Coming soon
Coming soon
Overall grade
Excellent · 79.2
Excellent · 78.5
Overall rank
#17 of 67
#19 of 67
Input price
$3.00 per 1M
$1.30 per 1M
Output price
$15.00 per 1M
$2.60 per 1M
Context window
1,000,000 tokens
1,048,576 tokens
Reasoning levels
Yes
No
Reads images
Yes
No
Model ID
claude-sonnet-4-6
deepseek-v4-pro-0813
Try both with one key
Same endpoint, same key, both hosted in the USA. Change one word to switch models, in Claude Code, Cursor, Cline or your own code.
# Ask either model the same thingcurlhttps://fullsendai.com/v1/chat/completions \-H"Authorization: Bearer $FULLSEND_API_KEY" \-d'{"model": "claude-sonnet-4-6", "messages": [...]}'# …then swap one word-d'{"model": "deepseek-v4-pro-0813", "messages": [...]}'
Questions
Is Claude Sonnet 4.6 or DeepSeek V4 Pro 0813 better?
They grade within two points of each other (79.2 and 78.5), so pick on price and the benchmarks that match your work.
Which is cheaper, Claude Sonnet 4.6 or DeepSeek V4 Pro 0813?
DeepSeek V4 Pro 0813: $1.30 in and $2.60 out per million tokens, against $3.00 and $15.00 through FullsendAI.
Which has the larger context window?
DeepSeek V4 Pro 0813, with 1,048,576 tokens.
Can I use both with one API key?
Yes, once they launch: both are coming soon, at the prices shown, and both will use the same FullsendAI key.
Scores: LMArena (CC BY 4.0), SWE-bench, Terminal-Bench, and model makers’ published results where marked v. Prices are FullsendAI’s, per million tokens. Data as of Oct 28, 2026.
