MODEL PROOF
DeepSeek V3.1
BETTER VALUE OPTION
A stored alternative has an equal-or-higher measured score and an equal-or-lower price.
Price under confirmation since 2026-10-12. Upstream lists another price for this model now, or other prices from its sellers. What is shown is the last we published; the new figures are published once a second day shows the same values. · Serving precision differs between offers.
GLM 5.3 Flash · Δ score 51.4 points · 48% lower measured price · $0.238 / 1M tokens (Price under confirmation since Oct 12, 2026)
Gemma 4 31B is a further stored option with these losses: 33K → 16K max output
- Independent LMArena score
- 1,419.7 ± 6.04 · 14,610 votes
- Context window
- 163.84K
- Maximum output
- 32.77K
- Input modalities
- text
- Output modalities
- text
- Published input price
- $0.270 / 1M tokens
- Published output price
- $1.00 / 1M tokens
- Pricing kind
- fixed
Inspect complete billing conditions and endpoint terms below.
Price from SiliconFlow: the cheapest offer that is serving, at standard delivery, with at least 90% of the reference context and at a declared precision that is not 4-bit (fp8), at its standard rate. The maker’s own precision is not known.
Price under confirmation since 2026-10-12 Upstream lists another price for this model now, or other prices from its sellers. What is shown is the last we published; the new figures are published once a second day shows the same values.
Cheaper right now: $0.425/M at DeepInfra — 4-bit It does not pass the like-for-like test, so it never sets a rank.
Every price dimension · USD per million tokens
| Input | $0.270/M |
|---|---|
| Output | $1.00/M |
| Cached input | Unknown/M |
| Cache write | Unknown/M |
| Cache write 1h | Unknown/M |
| Reasoning | Unknown/M |
Who sells it
The same weights, different shops. Cheapest is not like-for-like when serving precision differs.
Headline cheapest is a lower precision. Like-for-like at the best declared precision is $0.270/M from SiliconFlow.
5 provider offers · rates, limits and conditions
Rates are USD per million tokens. Endpoint terms can differ even when the quoted price and precision match. A listed parameter is a provider declaration, not a task-success test.
| Seller | Input | Output | Precision | Uptime (1d) |
|---|---|---|---|---|
| DeepInfradeepinfra/fp4 Endpoint terms
| $0.250 | $0.950 | fp4 | 99.93% |
| SiliconFlowsiliconflow/fp8 Endpoint terms
| $0.270 | $1.00 | fp8 | 96.46% |
| CoreWeavecoreweave/fp8 Endpoint terms
| $0.550 | $1.65 | fp8 | 97.34% |
| Maramara Endpoint terms
| $0.600 | $1.70 | undeclared | 97.97% |
| SambaNovasambanova/fp8 Endpoint terms
| $0.650 | $1.50 | fp8 | 97.82% |
Independent scores
| LMArena Elo | 1419.7default |
|---|---|
| LMArena row | deepseek-v3.1 |
LMArena Elo under CC BY 4.0. Absence of another board is not a score of zero.
Best rankings by task
- SVG #89 966
- 3D #93 1080
- Code categories #94 1116
- Game development #95 1089
- UI components #95 1089
- Websites #96 1125
- Data visualisation #98 1099
Per-task Elo and rank from Design Arena, via OpenRouter’s model feed. The rank is the feed’s, and it counts models OpenRouter does not list.
Capability
| Context window | 163K |
|---|---|
| Max output | 32K |
| Input modes | text |
| Tool use | yes |
| Reasoning | optional |
| Knowledge cutoff | 2025-03-31 |
| Open weights | Unknown |
Provenance
| Price source | Published record of 2026-10-06, under confirmation since 2026-10-12 |
|---|---|
| Fetched | 2026-10-13 |
| Held | Price and provider offers kept at the published record of 2026-10-06 until a second day confirms the newer upstream value. |
| Quality data | verified |
DeepSeek-V3.1 is a large hybrid reasoning model (671B parameters, 37B active) that supports both thinking and non-thinking modes via prompt templates. It extends the DeepSeek-V3 base with a two-phase long-context...
Questions this page answers
What does DeepSeek V3.1 cost?
$0.270/M in, $1.00/M out: the published record of 2026-10-06, under confirmation since 2026-10-12. That is the API row, not a subscription.
Does DeepSeek V3.1 have an independent quality score?
DeepSeek V3.1 has an LMArena score in this catalogue.
What beats DeepSeek V3.1?
GLM 5.3 Flash has an equal-or-higher measured score and an equal-or-lower price.
Does this page use Artificial Analysis scores for DeepSeek V3.1?
No. Artificial Analysis figures are not published here. Quality on this page is LMArena Elo where a score exists; otherwise the row is unrated.
Is the cheapest DeepSeek V3.1 endpoint the same product?
Headline cheapest is a lower precision. Like-for-like at the best declared precision is $0.270/M from SiliconFlow.
MODEL MONUMENT
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The verdict as one SVG, for a README or a docs page. It states this model's dominance status at the balanced workload on the LMArena lens, with the date it was computed, and it is rebuilt with the catalogue — so it changes when the verdict changes, including to one you would rather it did not.
[](https://undominated.ai/models/deepseek__deepseek-chat-v3.1/)<a href="https://undominated.ai/models/deepseek__deepseek-chat-v3.1/"><img src="https://undominated.ai/badge/deepseek__deepseek-chat-v3.1.svg" alt="DeepSeek V3.1 — Undominated.ai dominance verdict" height="36"></a>Direct file: https://undominated.ai/badge/deepseek__deepseek-chat-v3.1.svg — a static SVG, written by scripts/build-badges.mjs on every build, so the copy you embed is never
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