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CL46SAnthropic · Claude 4

Claude Sonnet 4.6

Anthropic's workhorse — 63.4% on DualEntry, strong balance of capability and cost.

Accounting overall

63.4%

Input / Output

$3.00 / $15 per MTok

Context

1M

Speed

~120 tok/s

Released

2025-12

Cutoff

2025-08

01Accounting Task Breakdown

Eight accounting-task categories borrowed from DualEntry's 101-task benchmark. Measured where published, synthesized from adjacent benchmarks otherwise.

Transaction Class.
76.0
Journal Entry
74.0
Accounts Payable
66.0
Accounts Receivable
64.0
Bank Reconciliation
60.0
Financial Reporting
50.0
Month-End Close
38.0
Accounting Knowledge
74.0
02Research

Sonnet 4.6 is the previous-generation mid-tier Anthropic offering — reliable, well-understood by developers, and present in many production agentic accounting tools at the time this issue publishes. At 63.4% on DualEntry it meaningfully underperforms GPT-5.4-Mini (74.3%) and GPT-5.4-Nano (75.2%) on accounting work, despite similar per-token pricing.

For tools built on Sonnet 4.6 today, the obvious upgrade path is either Opus 4.7 (for capability-first workflows) or GPT-5.4-Mini (for cost-optimized workflows). The question for tool builders: is your current Sonnet 4.6 integration producing the accuracy your customers expect? The DualEntry numbers suggest the ceiling is lower than it feels.

Citations