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TEXXR ▲
TEXXR/ Tags/Closed-Weight Models

Closed-Weight Models

Proprietary frontier models reachable only through an API, a subscription, or a cloud platform — no downloadable weights — including their pricing, access tiers, and the case for withholding.

1,313 articles  ·  2019–2026
Coverage by year
1920212223242526
Most-covered companies
OpenAI251 Google224 Anthropic213 Microsoft167 AI152 Gemini131 API88 Meta69 TechCrunch56 Amazon49 Apple47 LLM43 GPT26 AWS26 Codex25
Articles — page 2
OpenAI says one of its models exploited a website's security after third-party AI security lab Irregular mistakenly gave it internet access during evaluations
2026-08-05  ·  Wired  ·  sim 0.44
Meta is offering a cheaper Muse Spark 1.2 “contributor” tier priced at $0.10/1M input and $0.20/1M output tokens in exchange for using user prompts for training
2026-08-05  ·  Wall Street Journal  ·  sim 0.50
Sources and filings: Google assembled a ~$200B financing program for Anthropic, with $150B+ tied to TPUs and involving Broadcom, Blackstone, Apollo, and others
2026-08-04  ·  Financial Times  ·  sim 0.40
Artificial Analysis estimates DeepSeek V4-Flash's average cost at $0.03 per test, compared with Kimi K3's $0.86, GPT-5.6 Sol's $1.86, and Claude Fable 5's $3.15
2026-08-03  ·  Reuters  ·  sim 0.47
Alibaba prices Qwen3.8-Max at $2 per 1M input tokens and $6 per 1M output tokens via its API, below Kimi K3's $3/1M input tokens and $15/1M output tokens
2026-08-03  ·  The Information  ·  sim 0.46
OpenAI says an internal version of Astra, its next big model, produced results for 10 problems in math, quantum complexity, and theoretical computer science
2026-08-02  ·  OpenAI  ·  sim 0.46
Sources detail how OpenAI fell behind Anthropic in revenue growth and valuation after prioritizing consumer chatbots and flashy side projects over coding tools
2026-08-02  ·  Wall Street Journal  ·  sim 0.44
OpenAI says an internal version of Astra, its next big model, produced results for 10 problems in math, quantum complexity, and theoretical computer science
2026-08-01  ·  OpenAI  ·  sim 0.44
Sources: OpenAI demoed a new “Astra” AI model family to US policymakers and regulators this week, touting its improved abilities to complete long-running tasks
2026-08-01  ·  The Information  ·  sim 0.47
OpenAI says its models now have more than 1B active users and are used by more than 2M businesses
2026-08-01  ·  Wall Street Journal  ·  sim 0.46
Google starts rolling out access to Gemini Spark for Google AI Pro subscribers to over 160 countries and adds a Chrome auto browse integration on desktop
2026-08-01  ·  9to5Google  ·  sim 0.43
Anthropic says it discovered three of its models had breached three organizations after launching a review in response to the OpenAI-Hugging Face incident
2026-07-31  ·  Anthropic  ·  sim 0.42
Anthropic says three of its models, including an internal research model, gained unauthorized access to real-world systems during internal cybersecurity testing
2026-07-31  ·  Axios  ·  sim 0.46
OpenAI says its models now have more than 1B active users and are used by more than 2M businesses
2026-07-31  ·  Wall Street Journal  ·  sim 0.50
OpenAI says it is cutting the price of GPT-5.6 Luna by ~80% and the price of GPT-5.6 Terra by 20% after improving the efficiency of the systems that serve them
2026-07-31  ·  Axios  ·  sim 0.49
Sources: OpenAI demoed a new “Astra” AI model family to US policymakers and regulators this week, touting its improved abilities to complete long-running tasks
2026-07-31  ·  The Information  ·  sim 0.47
Anthropic says the models that breached three companies include Opus 4.7, Mythos 5, and an unnamed research model, and the earliest incidents date back to April
2026-07-31  ·  Wall Street Journal  ·  sim 0.47
OpenAI says it is cutting the price of GPT-5.6 Luna by ~80% and the price of GPT-5.6 Terra by 20% after improving the efficiency of the systems that serve them
2026-07-30  ·  Axios  ·  sim 0.49
OpenAI launches ChatGPT for Academic Researchers, giving 100K scientists, mathematicians, and engineers free access to its frontier models through 2027
2026-07-30  ·  Axios  ·  sim 0.50
OpenAI launches ChatGPT for Academic Researchers, giving 100K scientists, mathematicians, and engineers free access to its frontier models through 2027
2026-07-29  ·  Axios  ·  sim 0.47
Sources: OpenAI and Anthropic are lobbying the Trump administration to make sure lagging competitors also have to comply with government reviews of their models
2026-07-29  ·  The Information  ·  sim 0.45
Sources: Amazon overhauls its AI strategy, deprecating most of its flagship Nova AI models, as it shifts resources to its Frontier Model Research initiative
2026-07-28  ·  Business Insider  ·  sim 0.50
Sources: OpenAI and Anthropic are lobbying the Trump administration to make sure lagging competitors also have to comply with government reviews of their models
2026-07-28  ·  The Information  ·  sim 0.40
Sources: Moonshot is seeking access to more Nvidia Blackwell chips to prepare for Kimi K4's development, after training K3 on Nvidia chips, including Blackwell
2026-07-28  ·  The Information  ·  sim 0.41
Microsoft introduces MAI-Cyber-1-Flash, an AI model trained for cybersecurity, and launches Perception, an agentic security system to patch vulnerabilities
2026-07-27  ·  New York Times  ·  sim 0.40
Source: Sam Altman will meet with senior US officials, lawmakers, and economists in Washington, DC, this week to preview OpenAI's upcoming family of AI models
2026-07-27  ·  CNBC  ·  sim 0.40
US companies have flipped from “tokenmaxxing” to “thrift-maxxing”, mixing cheaper Chinese models with OpenAI's and Anthropic's, threatening the labs' valuations
2026-07-27  ·  Wall Street Journal  ·  sim 0.49
Microsoft says MAI-Cyber-1-Flash and MDASH, its vulnerability identification harness, deliver “world-class performance at 50% of the cost of leading models”
2026-07-27  ·  Microsoft AI  ·  sim 0.42
Anthropic launches Claude Opus 5, which it says comes close to Fable 5 performance at half the price; it is the new default model on Claude Max
2026-07-25  ·  Anthropic  ·  sim 0.42
Anthropic expects Opus 5 “classifiers to intervene around 85% less often than they do for Fable 5”; Opus 5 is not included in its 30-day data retention policy
2026-07-25  ·  Engadget  ·  sim 0.43
Anthropic says Opus 5 is the company's “most aligned model to date”; it is Anthropic's fourth model release in less than two months
2026-07-25  ·  Axios  ·  sim 0.50
Anthropic launches Claude Opus 5, which it says comes close to Fable 5 performance at half the price; it is the new default model on Claude Max
2026-07-24  ·  Anthropic  ·  sim 0.42
Sources: OpenAI told Hugging Face only this week its models caused the July 11 hack; the models appear to have been active online for days before being stopped
2026-07-24  ·  Wall Street Journal  ·  sim 0.42
Microsoft replaces OpenAI's image-generating models with its MAI models in its products; Mustafa Suleyman says MAI models are ~85% cheaper to run in PowerPoint
2026-07-24  ·  Bloomberg  ·  sim 0.48
Anthropic makes its Opus and Sonnet models available in voice mode and says voice mode can now tap into some connected apps like Gmail, Slack, Canva, and Notion
2026-07-24  ·  TechCrunch  ·  sim 0.46
Anthropic expects Opus 5 “classifiers to intervene around 85% less often than they do for Fable 5”; Opus 5 is not included in its 30-day data retention policy
2026-07-24  ·  Engadget  ·  sim 0.43
Opus 5 improves coding, reasoning efficiency, and prompt-cache-friendly tool use, and is priced at $5/1M input tokens and $25/1M output, same as Opus 4.8
2026-07-24  ·  ZDNET  ·  sim 0.40
Anthropic says Opus 5 is the company's “most aligned model to date”; it is Anthropic's fourth model release in less than two months
2026-07-24  ·  Axios  ·  sim 0.47
White House OSTP Director Michael Kratsios says “we have information that Moonshot AI distilled Anthropic's Fable for the development of its K3 model”
2026-07-23  ·  @mkratsios47  ·  sim 0.45
Anthropic makes its Opus and Sonnet models available in voice mode, and says voice mode can now tap into some connected apps like Gmail, Slack, and Notion
2026-07-23  ·  TechCrunch  ·  sim 0.45
Microsoft replaces OpenAI's image-generating models with its MAI models in its products; Mustafa Suleyman says MAI models are ~85% cheaper to run in PowerPoint
2026-07-23  ·  Bloomberg  ·  sim 0.48
White House OSTP Director Michael Kratsios says Moonshot AI “acquired GB300-equipped servers and has accessed GB300s in Thailand, likely to train its AI models”
2026-07-23  ·  Bloomberg  ·  sim 0.42
Sources: OpenAI's staff were “freaked out” when its AI models breached Hugging Face, as OpenAI used more aggressive training methods to compete with Anthropic
2026-07-23  ·  Financial Times  ·  sim 0.43
White House OSTP Director Michael Kratsios says “we have information that Moonshot AI distilled Anthropic's Fable for the development of its K3 model”
2026-07-22  ·  @mkratsios47  ·  sim 0.45
OpenAI says its models, including GPT-5.6 Sol and “an even more capable pre-release model”, breached Hugging Face while OpenAI tested their cyber capabilities
2026-07-22  ·  Axios  ·  sim 0.46
Source: OpenAI raised its projected cloud spending to ~$750B through 2030, up from its ~$600B projection earlier in 2026, reflecting its new cloud compute deals
2026-07-22  ·  Wall Street Journal  ·  sim 0.43
OpenAI says it now has 10M people using Codex and ChatGPT Work, nearly doubling usage from earlier this month when the company announced ChatGPT Work
2026-07-22  ·  Bloomberg  ·  sim 0.44
Google says Gemini 3.6 Flash improves coding, multimodal, and knowledge work performance and uses up to 17% fewer tokens and costs less per token vs. 3.5 Flash
2026-07-22  ·  CNBC  ·  sim 0.40
OpenAI executive Chris Lehane says Sam Altman plans to brief the Trump administration and US lawmakers next week on the company's upcoming generation of models
2026-07-22  ·  Bloomberg  ·  sim 0.44
Google prices Gemini 3.6 Flash lower than 3.5 Flash, at $1.50/1M input tokens and $7.50/1M output tokens, and Gemini 3.5 Flash-Lite at $0.30/1M and $2.50/1M
2026-07-22  ·  9to5Google  ·  sim 0.40
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How this tag is built: every article in the archive is scored by cosine similarity against a centroid built from example sentences, and everything above 0.40 becomes a candidate. A model then reads each candidate and decides whether it belongs. The similarity shown on each row is what made it a candidate, not the reason it was kept.