Frontier and open models
OpenAI began rolling GPT-6 into paid ChatGPT on October 7. Separately, GPT-6.1 Sol became available in the API, ChatGPT Work and Codex on September 29; OpenAI's benchmark comparisons remain vendor claims.
OpenAI · OpenAI SolCopy link to: OpenAI began rolling GPT-6 into paid ChatGPT on October 7. Separately, GPT-6.1 Sol became available in the API, ChatGPT Work and Codex on September 29; OpenAI's benchmark comparisons remain vendor claims.
Mistral Large 4 entered API preview October 6, with open weights promised later in October; Google announced limited cyber-defender access to Gemini 4 Argon September 30.
Mistral · Google DeepMindCopy link to: Mistral Large 4 entered API preview October 6, with open weights promised later in October; Google announced limited cyber-defender access to Gemini 4 Argon September 30.
Anthropic released Haiku 5.5 October 7, adding to its September Opus and Sonnet 5.5 releases. Artificial Analysis's prerelease evaluation placed Sonnet behind Opus on its maximum-effort index, not across every task.
Anthropic Haiku · Artificial AnalysisCopy link to: Anthropic released Haiku 5.5 October 7, adding to its September Opus and Sonnet 5.5 releases. Artificial Analysis's prerelease evaluation placed Sonnet behind Opus on its maximum-effort index, not across every task.
Cloudflare released Clef-omni open weights October 9, and Liquid AI released d1 decision-model weights October 7. Both companies' performance comparisons are vendor tests.
Cloudflare blog · Hugging Face — Liquid AICopy link to: Cloudflare released Clef-omni open weights October 9, and Liquid AI released d1 decision-model weights October 7. Both companies' performance comparisons are vendor tests.
This week's biggest shifts
October 7: OpenAI began the paid ChatGPT rollout of GPT-6, and Anthropic released Haiku 5.5.
OpenAI · AnthropicCopy link to: October 7: OpenAI began the paid ChatGPT rollout of GPT-6, and Anthropic released Haiku 5.5.
October 9: Anthropic disclosed that a Haiku 4.5 evaluation had sent a false police tip; Philadelphia police confirmed it had been spam-filtered. Anthropic said it is removing live internet access from internal evaluations while testing safeguards.
Anthropic research · 6abc — Philadelphia police statementCopy link to: October 9: Anthropic disclosed that a Haiku 4.5 evaluation had sent a false police tip; Philadelphia police confirmed it had been spam-filtered. Anthropic said it is removing live internet access from internal evaluations while testing safeguards.
October 9: Firmus withdrew its $5 billion Australian IPO and turned to private capital.
ReutersCopy link to: October 9: Firmus withdrew its $5 billion Australian IPO and turned to private capital.
October 10: Microsoft CEO Satya Nadella proposed a human-controlled AI emergency brake, independent audits and prompt incident reporting. These are proposals, not enacted rules.
CNBCCopy link to: October 10: Microsoft CEO Satya Nadella proposed a human-controlled AI emergency brake, independent audits and prompt incident reporting. These are proposals, not enacted rules.
What to watch
FT reported October 10 that Nvidia is considering a larger Reflection AI investment or acquisition; FT reported October 9 that SoftBank's Masayoshi Son seeks up to $100 billion from Gulf investors, with talks that may fail.
Financial Times · Financial TimesCopy link to: FT reported October 10 that Nvidia is considering a larger Reflection AI investment or acquisition; FT reported October 9 that SoftBank's Masayoshi Son seeks up to $100 billion from Gulf investors, with talks that may fail.
Mistral and Reflection promise open weights later in October after their respective October 6 and October 5 previews.
Mistral · ReflectionCopy link to: Mistral and Reflection promise open weights later in October after their respective October 6 and October 5 previews.
Google's September 30 Argon announcement promises broader access after testing.
Google DeepMindCopy link to: Google's September 30 Argon announcement promises broader access after testing.
Anthropic's September 28 prospectus precedes a pending IPO; an AI task force has 120 days from its October 3 account to make proposals.
Reuters · Wall Street JournalCopy link to: Anthropic's September 28 prospectus precedes a pending IPO; an AI task force has 120 days from its October 3 account to make proposals.