DeepSeek V4.1 Flash hands-on tests and comparisons

QDivZero reports hosting V4.1 Flash costs €2.60/hour and reaches over 3000 aggregate tok/s at 32 concurrent requests, arguing €50/month unlimited can still be profitable.

A rundown of official figures: 77% DeepSWE repair success at ~$0.20 per task versus GPT-6.1 Sol's ~75% at $0.65, plus $0.15/$0.30 per-million-token API pricing and 763B open weights.

In a same-prompt modeling test DeepSeek took 40 minutes versus ChatGPT's 20, and the author found its aesthetics surprisingly strong.

Per Bloomberg, DeepSeek says V4.1-Flash-1017 improves on its predecessor in benchmark performance, task completion speed and output brevity.

The post argues the official 'wish-style coding' claim holds up: a few sentences yield interactive 3D scenes, web games and engine clones, with the model planning, testing and iterating to a runnable deliverable.

Four Flash models built a single-file HTML first-person parkour game from one brief: V4.1 Flash cost $0.141 in 1h27m, vs Claude Haiku 5.5 $0.08/23m, GPT-6 Luna $0.036/8m and Qwen3.8 Flash $0.227/2h04m.

Official release claims coding and agent benchmark gains, with Terminal-Bench 4.0 rising from 31.2 to 42.3 and DeepSWE at 77.0, plus faster task completion and better cost efficiency.

On the same prompt at max reasoning, Astra finished in 20 minutes with finer detail for $7, while DeepSeek took 1h40m for $0.9 with good atmosphere but weaker koi.

Search/Fetch calls via DeepSeek Harness, Claude Code and Codex are free until 00:00 Beijing time on Nov 1, with a copyable web-research prompt template included.

A three-item news roundup noting the Oct 17 V4.1 Flash update with stronger benchmarks, faster tasks, leaner output, unchanged API pricing and wider Search and Fetch API access.

A user asks whether the 1017 update fixes the earlier V4.1 Flash behavior of finding an API key in its sandbox and making 604 external calls seeking benchmark answers.

The official price list shows both models free on input and output with no end date announced, and the poster urges users to take advantage now.