DeepSeek V4.1 Flash benchmarks
DeepSeek V4.1 Flash is an open-weights model from DeepSeek, released 10 Sep 2026. It ranks 27th of 51 on our overall leaderboard and 7th of 50 for value, though some of its results are not yet published. At A$0.74 per million tokens (blended), it costs about 4.9× cheaper than the median model we track. It writes about 231 tokens a second, and answers start after 9.5 s on average, thinking included. Its weights are public, so it can be hosted in Australia on your own infrastructure or an Australian cloud region.
- CONTEXT WINDOW
- 1,000,000 tokens
- MAX OUTPUT
- 384,000 tokens
- INPUT
- text, image
- WEIGHTS
- Open (MIT)
- RELEASED
- 10 Sep 2026
- OUTPUT SPEED
- 231 tok/s
- ANSWER STARTS AFTER
- 9.5 s (thinking included)
DeepSeek V4.1 Flash across our rankings.
Benchmark results.
Independent test scores are for the reasoning, max effort setting. “Among tracked” ranks DeepSeek V4.1 Flash against the 51 models on this site; LMArena ranks run across its full leaderboard.
| BENCHMARK | RESULT | AMONG TRACKED | SOURCE DETAIL |
|---|---|---|---|
| INDEPENDENT TESTS · ARTIFICIAL ANALYSIS | |||
| AA Intelligence Index | 39.5 | #23 of 51 | Reasoning, max effort |
| Humanity’s Last Exam | 39.2% | #38 of 51 | Reasoning, max effort |
| AA-LCR | 84.0% | #7 of 51 | Reasoning, max effort |
| SciCode | 51.9% | #31 of 46 | Reasoning, max effort |
| BLIND HUMAN VOTES · LMARENA | |||
| LMArena WebDev3,125 votes · ±12 | 1616 | #13 of 45 | #17 of 129 on LMArena · 22 Sep 2026 |
| LMArena Agent20,080 sessions | #12 | #10 of 37 | #12 of 46 on LMArena · 15 Sep 2026 |
What DeepSeek V4.1 Flash costs in Australian dollars.
List prices converted at the snapshot’s RBA rate, excluding GST. Reasoning models are billed for their thinking as output tokens, so heavier settings cost more than the job estimates show.
| PER MILLION TOKENS | AUD | USD LIST |
|---|---|---|
| Input tokens | A$0.42 | US$0.30 |
| Output tokens | A$1.68 | US$1.20 |
| Blended (3 in : 1 out) | A$0.74 | US$0.53 |
| JOB | COST (AUD) | MEDIAN MODEL |
|---|---|---|
| Customer support replyPER 1,000 REPLIES | A$1.35 | ≈ A$6.58 |
| Summarise a 30-page documentPER 100 DOCUMENTS | A$0.98 | ≈ A$4.74 |
| Agentic coding taskPER 10 TASKS | A$0.77 | ≈ A$3.72 |
Running DeepSeek V4.1 Flash in Australia.
Its weights are public, so it can be hosted in Australia on your own infrastructure or an Australian cloud region. How the platforms compare →
| PLATFORM | AVAILABILITY | DETAIL |
|---|---|---|
| AWS Bedrock · Sydney | NOT OFFERED | |
| AWS Bedrock · Melbourne | NOT OFFERED | |
| Azure · Australia East | NOT OFFERED | |
| Google Vertex AI · Sydney | NOT OFFERED | |
| Your own infrastructure | SELF-HOST | Open weights: run it on your own servers or GPU instances in an Australian region. |
Compare it with.
DeepSeek V4.1 Flash, answered.
How much does DeepSeek V4.1 Flash cost in Australian dollars?
DeepSeek V4.1 Flash lists at US$0.30 per million input tokens and US$1.20 per million output tokens — A$0.42 and A$1.68 at A$1 = US$0.7123 (RBA, 22 Sep 2026), excluding GST. A typical customer support reply works out at about A$1.35 per 1,000 replies, before any reasoning tokens.
Can I use DeepSeek V4.1 Flash in Australia with data kept onshore?
DeepSeek V4.1 Flash’s weights are public, so it can be hosted in Australia on your own infrastructure or an Australian cloud region. Availability comes from the cloud providers’ own documentation; check your provider’s current terms before relying on it for data-residency obligations.
How fast is DeepSeek V4.1 Flash?
Artificial Analysis measures DeepSeek V4.1 Flash at about 231 tok/s of output, with the answer starting after 9.5 s on average once thinking time is included (reasoning, max effort setting).
What is DeepSeek V4.1 Flash’s context window?
DeepSeek documents a context window of 1,000,000 tokens (1M), with up to 384,000 output tokens. On AA-LCR, which tests reasoning across ~100,000-token document sets, it scores 84.0%.
Ratings: LMArena leaderboard dataset (CC BY 4.0), rescaled for the lens scores · leaderboards to 22 Sep 2026
Evaluations, prices and speed: Artificial Analysis (artificialanalysis.ai) · fetched 23 Sep 2026
Exchange rate: Reserve Bank of Australia, table F11.1 · A$1 = US$0.7123 on 22 Sep 2026 · prices exclude GST
Snapshot 23 Sep 2026 · updated weekly · How the rankings work →