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Anthropic

Claude Sonnet 4.6

VS
DeepSeek

DeepSeek V4 Flash

✍️ Analysis by:the whichllmmodel Editorial Team|📅 Updated: June 2026

Decision Recommendation

👑 Editorial Verdict: DeepSeek V4 Flash strictly dominates Claude Sonnet 4.6 across all major dimensions. It is not only more cost-effective (blended cost of $0.17 vs $6.00 per 1M tokens) but also delivers superior coding accuracy (49.1% vs 0% on SWE-bench) and faster generation speeds (109.1 tps vs 54.3 tps). Unless you have platform lock-in, DeepSeek V4 Flash is the clear and optimal choice for all development workloads.

Model Specs

Claude Sonnet 4.6

Benchmarks & Scores

Coding (swe-bench-pro)
N/A
Reasoning (gpqa-diamond)
79.9%

Cost & Performance

Cost (per 1M tokens)
$6.00Input: $3.00 | Output: $15.00
Speed
54.3 tps
Context Window
1M tokens
Model Specs

DeepSeek V4 Flash

Benchmarks & Scores

Coding (swe-bench-pro)Winner (+)
49.1%
Reasoning (gpqa-diamond)Winner (+0.1%)
80%

Cost & Performance

Cost (per 1M tokens)34.3x cheaper
$0.17Input: $0.14 | Output: $0.28
Speed2.0x faster
109.1 tps
Context Window
1M tokens
Read our data collection methodology

Frequently Asked Questions

DeepSeek V4 Flash is cheaper than Claude Sonnet 4.6. DeepSeek V4 Flash has a blended cost of $0.17/1M tokens, which is about 34.3x cheaper than Claude Sonnet 4.6 at $6.00/1M tokens.

DeepSeek V4 Flash is faster than Claude Sonnet 4.6. DeepSeek V4 Flash generates 109.1 tokens per second (tps) compared to Claude Sonnet 4.6 which generates 54.3 tokens per second.

DeepSeek V4 Flash is better for coding tasks. It scores 49.1% on coding evaluations (swe-bench-pro) compared to Claude Sonnet 4.6 which scores N/A.

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