Company hub
DeepSeek
Every release, deal and policy move from DeepSeek — updated daily.
TopicsAll topics
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llm-deepseek Serialization Bug Replays Text After Tool Use
GitHub issue #11115 reveals a critical serialization bug in the llm-deepseek adapter that replays assistant text after tool_use blocks, permanently corrupting session logs and triggering INVALID_REQUEST errors on OpenAI-compatible endpoints.
By
Model chronicle · DeepSeek
DeepSeek-V4.1-Flash
api-docs.deepseek.com (source, opens in a new tab)DeepSeek-V4-Pro (GA)
api-docs.deepseek.com (source, opens in a new tab)DeepSeek-V4-Flash
api-docs.deepseek.com (source, opens in a new tab)DeepSeek-V4 (Pro & Flash preview)
V4-Pro and V4-Flash preview with a million-token context; legacy deepseek-chat/reasoner retired.
deepseek.com (source, opens in a new tab)DeepSeek-V3.2
api-docs.deepseek.com (source, opens in a new tab)DeepSeek-V3.2-Exp
api-docs.deepseek.com (source, opens in a new tab)DeepSeek-V3.1-Terminus
api-docs.deepseek.com (source, opens in a new tab)DeepSeek-V3.1
api-docs.deepseek.com (source, opens in a new tab)DeepSeek-R1-0528
api-docs.deepseek.com (source, opens in a new tab)DeepSeek-V3-0324
api-docs.deepseek.com (source, opens in a new tab)
Sources: company announcements & release notes.
Fact box
- HQ
- Hangzhou, China
- Founded
- 2023
- CEO
- Liang Wenfeng
- Valuation
- >$50B post-money (Jun 2026, reported)
- Core products
- DeepSeek-V4 · DeepSeek-R1 · DeepSeek Chat · API
- Latest round
- ¥50B+ First external round · Jun 2026
- Stories
- 73
Sources: deepseek.com, reuters.com
Latest on X
DeepSeek · @deepseek_ai
🚀 Introducing DeepInfer, our in-house inference framework, now fully open source! Powering DeepSeek-V4.1-Flash at scale with high throughput and low latency. We’re sharing our production stack to help the community lower compute costs, reduce energy use, and make AI more
🚀 DeepSeek-V4.1-Flash-1017 is here! Stronger benchmark performance, faster task completion, and shorter outputs than the previous version—a Pareto improvement in performance and cost. Now live on our website, app, and API. 🛠️ Optimized for @DeepSeekHarness, Tencent CodeBuddy,
Please check out @DeepSeekHarness. We just released packaged desktop versions for macOS and Windows; Linux users can get it from the @deepseek-ai/dsh package on npm.
🚀 Introducing DeepSeek-V4.1-Flash: smarter, faster, more efficient. 🔹 Introducing the smallest model in our new architecture family, with native visual understanding. 🔹 Designed for greater capability, faster inference, higher throughput, and scaling to larger models. 1/6
DeepSeek-V4-Flash-Vision-Exp is now live on the DeepSeek API Platform! 🚀 🔹 This experimental multimodal model matches DeepSeek-V4-Flash on text capabilities—including agents, reasoning, and world knowledge. 🔹 On multimodal agent benchmarks, V4-Flash-Vision-Exp makes a major
Editor's picks
Deals & funding
DeepSeek · rounds, valuations, partners, acquisitions · $7.4B raised in tracked primary rounds
Funding
DeepSeek closes first external round of over $7B
Per The Information via Reuters: >¥50B (~$7.4B) at a post-money valuation above $50B, with an unusual deal structure.
reuters.com (source, opens in a new tab)
All 1 rounds & deals as a table · 1 funding, 0 partnerships, 0 acquisitions
| Date | Event | Type | Counterparty / round | Amount | Valuation | Source |
|---|---|---|---|---|---|---|
| Jun 16, 2026 | DeepSeek closes first external round of over $7B Per The Information via Reuters: >¥50B (~$7.4B) at a post-money valuation above $50B, with an unusual deal structure. | Funding | First external round | ¥50B+ | $50B | reuters.com |
Sources: press reports.
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DeepSeek-V4.1-Flash Shrinks Always-On KV Cache to 890 Bytes per Token
DeepSeek’s 552B MoE activates 16B params in decode but only 8B in prefill. CSA2 + FP4 KV cuts…
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DeepSeek Targets STAR Market IPO to Finance AI Infrastructure
Chinese AI lab DeepSeek engages CITIC Securities for a Shanghai STAR Market IPO, aiming to fund compute needs…
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DeepSeek Hits $1B ARR After API Price Increases
DeepSeek reached a $1 billion annualized revenue run rate after raising API prices. Discover what this means for…
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DeepSeek Hits $1 Billion Annualized Revenue Run Rate
DeepSeek reaches a $1 billion revenue run rate through ultra-efficient models and low pricing. Discover how this growth…
Business
Studies
- LLM Reviewers Send 76% of Published Top-Journal Papers Back, Yet Miss Most Planted FlawsOct 23
- Only One AI Agent Beats Researchers’ Own Code on Most FrontierCS 2 TasksOct 22
- Chunked KV Compression Creates Periodic Blind Spots Up to 40 Points WideOct 19
- DeepSeek-V4.1-Flash Shrinks Always-On KV Cache to 890 Bytes per TokenOct 19
Infrastructure
More stories
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OpenAI and Anthropic Cut AI Model Prices Amid China Rivalry
OpenAI and Anthropic have drastically reduced flagship AI model API prices, with cuts reaching 80 percent, to compete against cheaper Chinese alternatives from DeepSeek and Moonshot.…
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LLM Reviewers Send 76% of Published Top-Journal Papers Back, Yet Miss Most Planted Flaws
Four LLMs reviewed 200 papers already published in journals like Nature and Cell: 75.6% of reviews demanded major revision or rejection, while planted flaws were caught…
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Only One AI Agent Beats Researchers’ Own Code on Most FrontierCS 2 Tasks
FrontierCS 2 deletes a paper’s contribution from its repository and asks agents to beat the authors’ own code. Claude Opus 5.5 passes 58% of 48 tasks;…
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Chunked KV Compression Creates Periodic Blind Spots Up to 40 Points Wide
DeepSeek-V4 family retrieval accuracy swings by as much as 40 pp depending on a token’s phase inside the compression window — gaps average scores hide.
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A 3B Model Hits 94.3 on AIME26 and 80.2 on LiveCodeBench
VibeThinker-3B from Weibo reaches frontier-band verifiable reasoning: 94.3 AIME26 (97.1 with claim-level TTS), 80.2 LiveCodeBench v6 Pass@1, 96.1% on recent LeetCode contests — without sacrificing IFEval…
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Turn Off Thinking Mode and Models Still Reason 99.9% of the Time
Thinking Inertia study: DeepSeek-V4-Flash keeps visible inference in 99.9% of open-ended answers with thinking disabled. Strict answer-only prompts raise Empty-Thinking Rate to ~40% but cut accuracy…
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Coding Agents Can’t Build the Agent You Actually Want — Yet
AgentSWE’s 25 commission-style tasks: strongest builders average 19.1 on Creation and 31.6 on Editing. Optimization closes under 5% of the remaining gap; 58.1% of held-out Creation…
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Scientific AI Agents Finish Only 21% of End-to-End Workflows — and Often Claim Success Anyway
FrontierChallenge: best configs pass 20.6% of 97 released science workflows. In electrochemistry, Avg. Score hits 94.9 with 0% full completion; 75.5% of failed Claude Code runs…
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Giving AI Agents Incentives Nearly Doubles How Often They Deceive, Benchmark Finds
DecepEval tests 9 frontier models on 1,532 scenarios: inducements raise deception by 41.6% on average, with long-horizon tasks hitting 87% induced rates.
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AI Resume Screeners Flipped Racial Bias Between Model Generations, Audit Finds
A paired-resume audit of 14 LLMs: GPT-3.5-turbo favored White-coded names by 2.12 points, while every model released in 2024 or later showed no gap or a…
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Agentic Harness Must Stay Independent from LLM Subscriptions
The DeepSeek GitHub debate reveals why the agentic harness should remain decoupled from LLM providers. Discover how provider-neutral orchestration prevents vendor lock-in and enables true BYOK…
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DeepSeek AI: Low-Cost Models Challenging OpenAI and Anthropic
DeepSeek’s efficient MoE models rival Western labs at fraction of the cost. Analyze TCO, compliance risks, and enterprise implications for adopting Chinese AI. Explore the guide.
Models & specs
DeepSeek · context window, max output, API price, modalities, knowledge cutoff, license
| Model | Released | Context | Max output | Price in / out (per 1M) | Modalities | Knowledge cutoff | License / access | Spec source |
|---|---|---|---|---|---|---|---|---|
| DeepSeek-V4.1-Flash | Sep 10, 2026 | 1M | 384K | $0.3 / $1.2 cached $0.006 Peak price; off-peak 50% lower. Served as deepseek-flash. | Text, image in → text out | — | Open weights | api-docs.deepseek.com |
| DeepSeek-V4-Pro (GA) | Aug 13, 2026 | 1M | 384K | $1.32 / $3.96 cached $0.044 Peak price; off-peak 50% lower (0.66/1.98). | Text in → text out | — | Open weights | api-docs.deepseek.com |
| DeepSeek-V4-Flash | Jul 31, 2026 | — | — | — | — | — | — | api-docs.deepseek.com |
| DeepSeek-V4 (Pro & Flash preview) DeepSeek-V4-Pro, DeepSeek-V4-Flash (preview) | Apr 24, 2026 | 1M | — | open weights | Text in → text out | — | Open weights | deepseek.com |
| DeepSeek-V3.2 | Dec 1, 2025 | — | — | — | — | — | — | api-docs.deepseek.com |
| DeepSeek-V3.2-Exp | Sep 29, 2025 | — | — | — | — | — | — | api-docs.deepseek.com |
| DeepSeek-V3.1-Terminus | Sep 22, 2025 | — | — | — | — | — | — | api-docs.deepseek.com |
| DeepSeek-V3.1 | Aug 21, 2025 | 128K | — | open weights | Text in → text out | — | Open weights, MIT 671B total / 37B active (MoE) | api-docs.deepseek.com |
| DeepSeek-R1-0528 | May 28, 2025 | — | — | — | — | — | — | api-docs.deepseek.com |
| DeepSeek-V3-0324 | Mar 24, 2025 | — | — | — | — | — | — | api-docs.deepseek.com |
Sources: company announcements & release notes. Prices = standard API list price in USD per 1M tokens at time of release or current docs; batch is typically 50% off.