Model comparison

Laguna S 2.1 vs DeepSeek-V4-Flash

Input: $0.09
Output: $0.18
Context: 1M
Released: 2026-07-21

Full model page →DeepSeekDeepSeek-V4-Flash

Input: $0.22 off-peak · $0.44 peak
Output: $0.66 off-peak · $1.32 peak
Context: 1M
Released: 2026-04-24

Short answer

DeepSeek-V4-Flash scores higher on 3 of the 3 benchmarks both models report; Laguna S 2.1 is cheaper on input tokens ($0.1 vs $0.2 per 1M, 2.4×).

Specs and pricing side by side

Spec	Laguna S 2.1	DeepSeek-V4-Flash
Maker	Poolside	DeepSeek
Released	2026-07-21	2026-04-24
Context window	1M	1Msame
Max output	not published	384K
Input price	$0.09	$0.22 off-peak · $0.44 peak
Output price	$0.18	$0.66 off-peak · $1.32 peak
Parameters	118B total · 8B active	284B total · 13B active
License	OpenMDW-1.1	MIT
Weights	Open weights	Open weightssame
Modalities	Text	Textsame

Not published by either maker: knowledge cutoff.

Benchmarks both models report

Benchmark	Laguna S 2.1	DeepSeek-V4-Flash
Terminal-Bench 2.1	70.2%	82.7%
Toolathlon Verified	49.7%	70.3%
DeepSWE	40.4%	54.4%

Scores are as published by each maker or its cited source; harness, reasoning effort and date can differ between rows, so treat small gaps as ties. Sources are listed on each model page.

Which one should you pick?

Pick Laguna S 2.1 if…

Cost matters: input tokens cost 2.4× less ($0.1 vs $0.2 per 1M).
Your use case is: reach for it when you want to move high-volume agentic coding off a metered API and onto your own hardware without giving up long-horizon performance.

Pick DeepSeek-V4-Flash if…

You care about Terminal-Bench 2.1, Toolathlon Verified, DeepSWE (it scores higher on 3 shared benchmarks).
Your use case is: high-volume agentic and coding workflows where cost and latency matter more than absolute peak quality.

FAQ

Which is better, Laguna S 2.1 or DeepSeek-V4-Flash?

DeepSeek-V4-Flash scores higher on 3 of the 3 benchmarks both models report; Laguna S 2.1 is cheaper on input tokens ($0.1 vs $0.2 per 1M, 2.4×). The better pick depends on whether you value benchmark scores, price per token, context length or openness for your workload.

How much cheaper is Laguna S 2.1?

Laguna S 2.1: $0.09 input, $0.18 output. DeepSeek-V4-Flash: $0.22 off-peak · $0.44 peak input, $0.66 off-peak · $1.32 peak output (list API prices as published by each maker).

What are the context windows of Laguna S 2.1 and DeepSeek-V4-Flash?

Laguna S 2.1 offers 1M; DeepSeek-V4-Flash offers 1M with up to 384K output.

Is Laguna S 2.1 newer than DeepSeek-V4-Flash?

Laguna S 2.1 was released 2026-07-21; DeepSeek-V4-Flash was released 2026-04-24.