{"slug":"deepseek-v4-1-flash","label":"DeepSeek V4.1-flash","item_count":11,"day_count":8,"source_count":2,"first_seen":"2026-09-12T05:56:05+00:00","last_updated":"2026-09-27T05:47:25+00:00","via_scout":true,"generated_at":"2026-10-03T05:03:10.863268+00:00","sources":["latent_space","search_cn_open_weight_labs"],"days":[{"date":"2026-09-12","items":[{"title":"[AINews] DeepSeek v4.1-Flash: 763B-P8B-D16B novel causal Encoder–Decoder architecture with vision marks the Return of the Whale","url":"https://www.latent.space/p/ainews-deepseek-v41-flash-763b-p8b","source":"latent_space","type":"news","summary_1line":"We agree with Sebastian: this should have been DeepSeek v5","sid":"d1d28ac13afc9a24","published":"2026-09-12T05:56:05+00:00","editor_note":"AINews' technical deep dive frames the architecture as v5-caliber."}]},{"date":"2026-09-13","items":[{"title":"DeepSeek Cut Its KV-Cache HBM Need 75% and SSD Need 87.5%. Micron and Sandisk Investors Should Pay Attention","url":"https://news.google.com/rss/articles/CBMikwFBVV95cUxQdTBkcTJTZUV4eFBPTGhURGNqTjRodllXRG02RnBXRklxRUpHMVEtNTJNaEVXYWZGbUpMUHFnY0h2cEM3Yjk5ZFBadFFjQl92M3R4T0tEZnZ6UVJKSnQxVmNqeWIyQ3gwREd6ZnkwYnJ5LUhOWkpiZGZ5WE5zejF6LVc2dzlNTml1Z25vbXE2cWVIb1E?oc=5","source":"search_cn_open_weight_labs","type":"news","summary_1line":"DeepSeek Cut Its KV-Cache HBM Need 75% and SSD Need 87.5%. Micron and Sandisk Investors Should Pay Attention Yahoo Finance","sid":"4cc7a7bea4b884e3","published":"2026-09-13T01:16:00+00:00","editor_note":"Puts exact numbers on the memory cut: 75% less HBM, 87.5% less SSD."}]},{"date":"2026-09-14","items":[{"title":"DeepSeek Routes All V4-Pro API Traffic to V4.1-Flash at Flash Rates","url":"https://news.google.com/rss/articles/CBMid0FVX3lxTE5VY0ExTHVGdTZKVHcteGY3aUVVWGNrSjVkbm5naktuTHZlVWxLVF9TQVlTWk1OcU1xZHhoNk5JQS1UUEtzSWc4ZUZGYUFkN2FucHdnVjVPQUF1NS1zb1dJUERkazI3TGZJem1NUDYtM25uTlJ2am13?oc=5","source":"search_cn_open_weight_labs","type":"news","summary_1line":"DeepSeek Routes All V4-Pro API Traffic to V4.1-Flash at Flash Rates Pandaily","sid":"7f7e6754ebc2c737","published":"2026-09-14T01:51:16+00:00","editor_note":"DeepSeek starts serving all V4-Pro API traffic with V4.1-Flash, at Flash's lower price."},{"title":"DeepSeek-V4.1-Flash Packs 552B Parameters With Efficient MoE Inference","url":"https://news.google.com/rss/articles/CBMilwFBVV95cUxNcl92MXQtNS1KWXIzZ1RuMXNQdFUzTTNnbnhRcDlZNXp0Z0JvSG01WFM0UDB4d24tNFo2ZUtHNUJwYm5pZFNmd2wybjVNczRRbnI3SGJVdnJUaHk0bGpabXd0RVJLWFVteDRyVlIxYy1sVjBjMW1XQnlQZTBiZVFWd3Bram5nc3g3Zk83aUJxMGVIOVlDSS04?oc=5","source":"search_cn_open_weight_labs","type":"news","summary_1line":"DeepSeek-V4.1-Flash Packs 552B Parameters With Efficient MoE Inference HackerNoon","sid":"1bc5bf8717fc17be","published":"2026-09-14T03:01:33+00:00","editor_note":"Publishes the 552B-parameter MoE spec behind the efficiency claims."},{"title":"DeepSeek V4.1 Flash Uncensored: 2,254 Downloads [2026]","url":"https://news.google.com/rss/articles/CBMieEFVX3lxTE96QzgzWnBvb0ZLemE2OEljRklObzNNMUZsNmJ4NXZuX0ZRRWFUVjBlaUR1cVNuelk3cHNGSUZLMTdFSndjN01oWmVackJkZHo0bzVPWGkzMjVTcmRDcTlnRHROb3ZlSnFzTkJRNU9yZVhkc1hPaDVWNw?oc=5","source":"search_cn_open_weight_labs","type":"news","summary_1line":"DeepSeek V4.1 Flash Uncensored: 2,254 Downloads [2026] shattered.io","sid":"e3fd47e3082f9e2b","published":"2026-09-14T10:25:33+00:00","editor_note":"A community uncensored fine-tune passes 2,254 downloads."},{"title":"DeepSeek V4.1 Flash Prices Cached Input To $0.003 Per Million Tokens","url":"https://news.google.com/rss/articles/CBMiuAFBVV95cUxOWEQ2MVVIbFlyaXBuRlRodzhmeTkyamlOY29Fcm9OeG1SRHBMdjlJT2VYWHI0M3g0RFM4eGlMZHdXYmd6THBnZWpJVGNVV21NUVZ5QUlSSmhzMEt6OV9Gbmp5MXRCeDFZRWJzT3JuTjVUWGdBUTIzQjBlLUNtUWk4VklxRGoxOFY3VXdDNldHWTVoakV3ODFiNUNfb3pQUTZFUVhWb1p2M0NzUlhhNEUxbWkwWkl1Z2hn?oc=5","source":"search_cn_open_weight_labs","type":"news","summary_1line":"DeepSeek V4.1 Flash Prices Cached Input To $0.003 Per Million Tokens Forbes","sid":"95e33866f411d3ef","published":"2026-09-14T23:00:12+00:00","editor_note":"Cached-input pricing falls again, to $0.003 per million tokens."}]},{"date":"2026-09-17","items":[{"title":"DeepSeek V4 Pro vs Qwen3-Coder vs Devstral: 11pt Gap [2026]","url":"https://news.google.com/rss/articles/CBMihAFBVV95cUxPOGZPZnNFd0lnWk01VlkxWWhlSWg3cEhyQk93YWNxUVpRY0hQTmw3UlpSTHZPRkdYb2N2QTFFbTcycXowbVptb2NoLTRubk8yVVhlRTVEeGFRWXZqa29qNUdXWXVGRGwxN3d4cTlWc3VVRVFGV1doN2E0aXZLYUdOSUx5M1I?oc=5","source":"search_cn_open_weight_labs","type":"news","summary_1line":"DeepSeek V4 Pro vs Qwen3-Coder vs Devstral: 11pt Gap [2026] tech-insider.org","sid":"94c7e66f5dacc673","published":"2026-09-17T00:29:18+00:00","editor_note":"Independent benchmark puts V4-Pro 11 points ahead of Qwen3-Coder and Devstral on coding tasks."}]},{"date":"2026-09-20","items":[{"title":"DeepSeek-V4.1-Flash Ships Causal Encoder–Decoder MoE With 1M Context and Extreme KV Compression","url":"https://news.google.com/rss/articles/CBMieEFVX3lxTFBURmg4a0h5UjhaZnhrNXBOb0Z4ck5PQUtESUFVOGtIVmpld2wtYWRIOU5XWFVPaV9ZVUdRWXJDcTNYSnV1cVZwY3VZYkJabGJRMjVDRFNqQU5oaXhJYkJxb1NtU1drWndGZHM3ejdNaktUbkF5MmpYNA?oc=5","source":"search_cn_open_weight_labs","type":"news","summary_1line":"DeepSeek-V4.1-Flash Ships Causal Encoder–Decoder MoE With 1M Context and Extreme KV Compression Pandaily","sid":"01a617c33f0013bb","published":"2026-09-20T02:58:35+00:00","editor_note":"A second outlet restates the causal encoder-decoder design with added specifics: 1M-token context and extreme KV-cache compression."}]},{"date":"2026-09-22","items":[{"title":"ZenMux Launches DeepSeek V4.1 Flash for High-Throughput Reasoning","url":"https://news.google.com/rss/articles/CBMiuAFBVV95cUxPQ0NoQzQtUGFmV0xMdTRMQTBLWTJ2OG02NEdicUVnajJpeXI1bEVTV0hSMWdTSHlJOV9lSm1wNk5ZZ0lCWUhaTm5CTFZYTXNSWHhaYWtDMUdzcm9mOTJJV2lxbEQwWFNROXJ3Q2FER1d6bGlYQ3paSkJhbkc2VUx4bmlvb1V4YkdrV0dPVlN3ajlMVkJPeExKU3pyNUw2YkdIRzBsdHZxOGUxUXpvZGJackVMWVJIT2Nf?oc=5","source":"search_cn_open_weight_labs","type":"news","summary_1line":"ZenMux Launches DeepSeek V4.1 Flash for High-Throughput Reasoning USA Today","sid":"88c84b7dce9138f2","published":"2026-09-22T18:54:01+00:00","editor_note":"ZenMux launches DeepSeek V4.1-Flash for high-throughput reasoning, the first third-party host to pick it up."}]},{"date":"2026-09-25","items":[{"title":"DeepSeek V4.1 Flash vs V4 Pro vs V4-Flash: 4.4x Gap [2026]","url":"https://news.google.com/rss/articles/CBMifEFVX3lxTE9ybnBqbUJsSEJOWDhzQzRHQ3dldVZYa3BCNFZDOEJsNjdYcVgtR0FmVGJMbUxnbG5PUnU2aXlqdDEwVllqZjlOV3cyWXJwS0pRRS1fS21iblg4X2VMd0swY0s2Um5JY0RrSzJyRWRzbG5NbjBDUnBPN1lwZ3E?oc=5","source":"search_cn_open_weight_labs","type":"news","summary_1line":"DeepSeek V4.1 Flash vs V4 Pro vs V4-Flash: 4.4x Gap [2026] tech-insider.org","sid":"8a60defe95a4d885","published":"2026-09-25T12:10:41+00:00","editor_note":"A fourth benchmark write-up in the series puts the V4.1-Flash/V4-Pro/V4-Flash gap at 4.4x, still without independent verification of DeepSeek's own efficiency numbers."}]},{"date":"2026-09-27","items":[{"title":"DeepSeek V4.1-Flash Pricing: 70% Cheaper, Beats Opus 5","url":"https://news.google.com/rss/articles/CBMidkFVX3lxTFB1UlY1OW8tT1ZmbXZQR3hjQmZRcnExM1dIS0NWMm8xS3Q0R1dmU2JUeGIxcW1LdzM4ZmIyc1ZidU9jbVZzR2NPenhXLUNiVURIVmNla3lYUkRCVFF5NmdHQXpPWTIta3pTZ1VIdjYzUXNvb21BT3c?oc=5","source":"search_cn_open_weight_labs","type":"news","summary_1line":"DeepSeek V4.1-Flash Pricing: 70% Cheaper, Beats Opus 5 shattered.io","sid":"4ce1e97ce10c119a","published":"2026-09-27T05:47:25+00:00","editor_note":"A fifth benchmark write-up claims the model beats Anthropic's Opus 5 at 70% lower cost, still without independent verification."}]}],"editorial":{"tldr":"DeepSeek's V4.1-Flash arrived as a smaller, faster model, and a Sep 12 analysis called its encoder-decoder design a v5-caliber step. On Sep 13 DeepSeek quantified the efficiency claim as a 75% HBM and 87.5% SSD cut.","stale":false,"whats_new":"A Sep 27 shattered.io write-up claims V4.1-Flash beats Anthropic's Opus 5 at 70% lower cost -- the fifth benchmark comparison in this series since launch, now aimed at a Western flagship instead of DeepSeek's own prior models, still with no independent verification.","why_it_matters":"Anyone calling the V4-Pro endpoint is now served different weights than they pinned, at a price that keeps falling, without a version bump to signal either change -- and now a third-party host serves the same model, so routing choices need re-checking too.","take_for_builders":"Re-run your eval suite against the V4-Pro endpoint: you're getting V4.1-Flash's outputs at a still-falling price, and any prompt or behavior tuned to V4-Pro specifically may have silently drifted. If you route through ZenMux or another third-party host, verify it serves the same weights before trusting cross-provider evals.","status":{"state":"Shipped · V4-Pro traffic silently rerouted, now on third-party hosts too","tone":"turn","changed":"2026-09-14","detail":"V4.1-Flash launched in mid-September as a smaller, faster model, and by Sep 14 DeepSeek was routing all V4-Pro traffic to it at a falling price. Sep 17-27 added benchmark write-ups, architecture specifics, third-party hosting, and a Sep 27 claim of beating Opus 5 at 70% lower cost.","track":[{"label":"launch","detail":"Sep 12","tone":"launch","weight":30},{"label":"traffic rerouted + price cuts","detail":"Sep 14 → now","tone":"turn","weight":22},{"label":"architecture detail confirmed","detail":"Sep 20","tone":"rising","weight":9},{"label":"third-party hosting + ongoing benchmarks","detail":"Sep 22 → now","tone":"now","weight":25}]},"beats":[{"kicker":"LAUNCH","tone":"launch","headline":"AINews deep dive: V4.1-Flash's causal encoder-decoder architecture \"should have been DeepSeek v5\"","summary":"DeepSeek's smaller, faster V4.1-Flash arrives; the Sep 12 analysis is the first technical read.","sids":["d1d28ac13afc9a24"]},{"kicker":"QUANTIFIED","tone":"now","headline":"DeepSeek puts numbers on the memory cut: 75% less HBM, 87.5% less SSD","sids":["4cc7a7bea4b884e3"]},{"kicker":"THE TURN","tone":"turn","headline":"DeepSeek quietly swaps V4-Pro traffic for V4.1-Flash at Flash pricing","summary":"Four days after launch, calls to the V4-Pro endpoint are served by V4.1-Flash instead, billed at the cheaper Flash rate.","sids":["7f7e6754ebc2c737"]},{"kicker":"AFTERMATH","tone":"now","headline":"552B-parameter spec surfaces as a community uncensored fine-tune racks up downloads","sids":["1bc5bf8717fc17be","e3fd47e3082f9e2b"]},{"kicker":"PRICE CUT","tone":"now","headline":"Cached-input pricing drops again to $0.003 per million tokens","sids":["95e33866f411d3ef"]},{"kicker":"BENCHMARKS","tone":"now","headline":"Benchmark write-ups put the coding gap at 11 points over Qwen3-Coder and Devstral","sids":["94c7e66f5dacc673"]},{"kicker":"ARCHITECTURE","tone":"rising","headline":"Second outlet confirms 1M-token context via extreme KV-cache compression","sids":["01a617c33f0013bb"]},{"kicker":"THIRD-PARTY HOSTING","tone":"now","headline":"ZenMux adds V4.1-Flash for high-throughput reasoning","summary":"First sign the model is spreading to inference platforms beyond DeepSeek's own API.","sids":["88c84b7dce9138f2"]},{"kicker":"NOW","tone":"now","headline":"Benchmark series now targets a Western flagship: Opus 5 at 70% lower cost","summary":"A Sep 25 write-up claims a 4.4x gap over V4-Pro and V4-Flash; a Sep 27 piece claims V4.1-Flash beats Opus 5. Neither is independently verified.","sids":["8a60defe95a4d885","4ce1e97ce10c119a"]}],"open_questions":["Does the claimed memory-footprint cut hold up in independent agent-workload benchmarks, not just DeepSeek's own numbers?","Will DeepSeek formally deprecate the V4-Pro endpoint, or keep serving V4.1-Flash under the old name indefinitely?","Do outputs from the V4-Pro endpoint show measurable quality or behavior differences now that V4.1-Flash serves them?","Has the 1M-token context and KV-cache compression figure been independently benchmarked, or does it restate DeepSeek's own claims?","Does ZenMux serve the identical weights and config as DeepSeek's own endpoint, or a re-quantized variant with different behavior?","Does the claimed edge over Opus 5 hold up under independent benchmarking, given the same content series already ran four unverified DeepSeek-internal comparisons?"],"generated_at":"2026-10-02T15:03:56Z"}}