DeepSeek V4.1 Flash model for reasoning and agentic coding
DeepSeek V4.1 Flash is offered by 76 providers on this page. Public prices are shown for 69 of them. Its official list price is $0.15 per 1M input tokens and $0.60 per 1M output tokens. The lowest paid channel is engy at $0.04 / $0.08 per 1M, about 16× below the list price. That channel is a third-party gateway, so confirm its availability and rate limits before depending on it. It also has 3 free ($0) channels and 4 covered by a paid subscription; free tiers usually carry rate limits, and subscription-covered access bills $0 per token only after the subscription fee.
Artificial Analysis rates it 39.5 on the Intelligence Index. Against its lowest blended price of $0.05 per 1M, that is roughly 790 index points per dollar, which is the value ratio the leaderboards rank on. Median output speed is 223 tokens per second, with 1.12s to the first token. Running one task of the Artificial Analysis suite costs about $0.2652, which reflects how many tokens its reasoning consumes rather than the unit price alone.
The context window is 1,000,000 tokens at the reference host, but hosts report different limits, from 327,680 to 1,050,000, so the usable window depends on the provider you pick. It supports reasoning, tool use, and structured output. Accepted input modalities are Text, Image, and PDF. The weights are open, so it can also be self-hosted or served through a gateway of your choice. Providers report the capability flags inconsistently, so verify a specific feature against the host you plan to use. Its training knowledge cuts off at 2025-05.
Quality is independently evaluated by Artificial Analysis. Speed/latency are model-level medians.
| Provider | Tier | Input | Output | Cache read | Cache write | Context | Output limit | Status |
|---|---|---|---|---|---|---|---|---|
| Alibaba Token Plan | Gateway | Subscription | $0 | $0 | 1,000,000 | 384,000 | ||
| NaN deepseek-v4-flash | Gateway | Free | — | — | 1,000,000 | 384,000 | ||
| Umans AI Coding Plan umans-deepseek-v4.1-flash | Gateway | Subscription | $0 | $0 | 1,048,576 ⚠ | 393,215 | ||
| Alibaba Token Plan (China) | Gateway | Subscription | $0 | $0 | 1,000,000 | 384,000 | ||
| SCNet Token Plan DeepSeek-V4.1-Flash | Gateway | Subscription | $0 | — | 1,000,000 | 384,000 | ||
| Nvidia | Cloud | Free | — | — | 1,000,000 | 384,000 | ||
| Kenari deepseek-v4-1-flash | Gateway | Free | — | — | 1,000,000 | 384,000 | ||
| engy | Gateway | $0.04 | $0.08 | $0.008 | — | 327,680 ⚠ | 65,536 | |
| AMD DeepSeek-V4.1-Flash | Cloud | $0.14 | $0.28 | $0.0028 | — | 1,048,576 ⚠ | 384,000 | |
| Eden AI flexai/DeepSeek-V4.1-Flash | Gateway | $0.14 | $0.42 | $0.021 | — | 1,048,576 ⚠ | 384,000 | |
| DeepSeekOfficial deepseek-flash | First-party | $0.15 | $0.60 | $0.003 | — | 1,000,000 | 393,216 | |
Sorted by blended price (input×0.75 + output×0.25) asc. The official channel always shows regardless of rank. Whether a gateway's low price is actually usable can't be verified.
Interleaved thinking (reasoning between tool calls) is declared by 28 of 76 providers.
1 / 76 providers expose no reasoning control (reasoning_options: []).
| Mode | Provider | Input | Output | Cache read | Cache write |
|---|---|---|---|---|---|
| priority | Fireworks AI | $0.38 | $1.50 | $0.0075 | — |
7 more channels offer $0 (Alibaba Token Plan, NaN, Umans AI Coding Plan etc.); free tiers usually have rate limits and no SLA, excluded from ranking.
| Name | Conditions | Score | Metric | Source |
|---|---|---|---|---|
| GPQA Diamond | variant: reasoning_effort=100 | 90.9 | pass@1 | Source ↗ |
| MathArena Apex | variant: reasoning_effort=100 | 65.6 | pass@1 | Source ↗ |
| Humanity's Last Exam | variant: reasoning_effort=100 · dataset: full set | 36.8 | pass@1 | Source ↗ |
| Humanity's Last Exam | variant: reasoning_effort=100 · dataset: text-only subset | 39.1 | pass@1 | Source ↗ |
| Codeforces | variant: reasoning_effort=100 | 3471 | rating | Source ↗ |
| Terminal-Bench | harness: DeepSeek Harness minimal mode · variant: reasoning_effort=100 · v2.1 | 90.6 | pass@1 | Source ↗ |
| Terminal-Bench | harness: DeepSeek Harness minimal mode · variant: reasoning_effort=100 · v3.0 | 30 | pass@1 | Source ↗ |
| Terminal-Bench | harness: DeepSeek Harness minimal mode · variant: reasoning_effort=100 · v4.0 | 31.2 | pass@1 | Source ↗ |
| DeepSWE | harness: mini-swe-agent · variant: reasoning_effort=100 · v1.1 | 74.2 | resolved | Source ↗ |
| ProgramBench | harness: DeepSeek Harness minimal mode · variant: reasoning_effort=100 | 20.3 | almost@1 | Source ↗ |
| NL2Repo | harness: DeepSeek Harness minimal mode · variant: reasoning_effort=100 | 64 | score | Source ↗ |
| CyberGym | variant: reasoning_effort=100 | 88.1 | pass@1 | Source ↗ |
| ExploitGym | variant: reasoning_effort=100 | 15.3 | pass@1 | Source ↗ |
| AutomationBench | variant: reasoning_effort=100 | 54.8 | pass@1 | Source ↗ |
| Agents' Last Exam | variant: reasoning_effort=100 | 31.8 | pass@1 | Source ↗ |
| SEC-Bench Pro | harness: Claude Code · variant: reasoning_effort=100 | 62.8 | pass@1 | Source ↗ |
| Humanity's Last Exam | variant: reasoning_effort=100; with tools | 63.9 | pass@1 | Source ↗ |
| Chartography | harness: Claude Code · variant: reasoning_effort=100; with tools | 78.9 | pass@1 | Source ↗ |
| BabyVision | harness: Claude Code · variant: reasoning_effort=100; with tools | 89.6 | pass@1 | Source ↗ |
| ZeroBench | harness: Claude Code · variant: reasoning_effort=100; with tools · dataset: main | 49 | pass@5 | Source ↗ |
| DeepSWE | harness: Claude Code · variant: reasoning_effort=100 · v1.1 | 69.8 | resolved | Source ↗ |
| Terminal-Bench | harness: Claude Code · variant: reasoning_effort=100 · v2.1 | 88 | pass@1 | Source ↗ |
| DeepSWE | harness: Codex · variant: reasoning_effort=100 · v1.1 | 65.6 | resolved | Source ↗ |
| Terminal-Bench | harness: Codex · variant: reasoning_effort=100 · v2.1 | 84.1 | pass@1 | Source ↗ |
| DeepSWE | harness: OpenCode · variant: reasoning_effort=100 · v1.1 | 65.5 | resolved | Source ↗ |
| Terminal-Bench | harness: OpenCode · variant: reasoning_effort=100 · v2.1 | 85 | pass@1 | Source ↗ |
| DeepSWE | harness: Pi · variant: reasoning_effort=100 · v1.1 | 66.2 | resolved | Source ↗ |
| Terminal-Bench | harness: Pi · variant: reasoning_effort=100 · v2.1 | 86.1 | pass@1 | Source ↗ |
| Terminal-Bench | harness: mini-swe-agent · variant: reasoning_effort=100 · v2.1 | 90.3 | pass@1 | Source ↗ |
| DeepSWE | harness: DeepSeek Harness minimal mode · variant: reasoning_effort=100 · v1.1 | 72.6 | resolved | Source ↗ |
| DeepSWE | harness: DeepSeek Harness standard mode · variant: reasoning_effort=100 · v1.1 | 70.5 | resolved | Source ↗ |
| Terminal-Bench | harness: DeepSeek Harness standard mode · variant: reasoning_effort=100 · v2.1 | 85.8 | pass@1 | Source ↗ |
| DeepSWE | harness: DeepSeek Harness PTC mode · variant: reasoning_effort=100 · v1.1 | 67.6 | resolved | Source ↗ |
| Terminal-Bench | harness: DeepSeek Harness PTC mode · variant: reasoning_effort=100 · v2.1 | 85.8 | pass@1 | Source ↗ |
The same benchmark scores very differently across harness / dataset, so the qualifying conditions must be shown together.
Individual evaluations run by Artificial Analysis, on the same reasoning tier as the intelligence score above. Each benchmark has its own task set and harness, so rows are not comparable with one another. The Intelligence Index above draws on a different, newer set of evaluations.