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Daily Frontier Digest ·

OpenAI's newest models get much better at COBOL, Fortran and other legacy languages

Curated by Alfredo Borrás · Plymouth AI Lab

OpenAI says GPT-6.1 Sol now migrates COBOL with 86.6% accuracy, up from 5.4%, the US bars DeepSeek from civilian federal agencies, and MiniMax ships M3.1 Flash at $0.15 per million input tokens.

The story today

OpenAI's newest models get much better at COBOL, Fortran and other legacy languages

On 19 October OpenAI published two evaluations aimed at programming languages with little public code to learn from, such as COBOL, Fortran, OCaml and Visual Basic. It points out that these languages still run a large share of banking, card-payment and scientific systems, and that customers told it coding models struggle with them.

The first test, MultiLangBench, asks a model to build a SQLite-compatible database engine from scratch in one of 20 languages, checked against SQLite's own test suite. At maximum reasoning effort GPT-6 Astra averages an 87.4% pass rate, against 26.8% for GPT-5.6 Sol, and scores above 83% in 19 of the 20 languages. COBOL is still the hardest at about 72%. The cheaper GPT-6 Luna reaches 40.3% at an estimated $0.77 per sample, versus $3.48 for GPT-5.6 Sol.

The second test migrates COBOL programs into C++, Java, Kotlin, Python or Rust, and only counts a migration as correct if hidden tests show byte-for-byte identical output. That matters because COBOL's fixed-point arithmetic quietly truncates decimals, so a rewrite that rounds instead can run cleanly and still produce different financial results. GPT-6.1 Sol gets 86.6% right at low reasoning effort, against 5.4% for GPT-5.6 Sol at the same setting and at 61% of the API cost; at higher effort it reaches 97.9%.

OpenAI is releasing the MultiLangBench setup and test suite on GitHub with per-language results. It also notes that production migrations still need expert review and testing against each system's business rules.

Why it matters: If your business sits on legacy code that nobody wants to touch, AI-assisted migration just got a lot more credible on paper. Treat these as vendor numbers and pilot on one well-tested module before betting a budget on it.

Sources: OpenAI

Highlights

  1. MiniMax M3.1 Flash goes on sale at $0.15/$0.60 per million tokens

    MiniMax says the anonymous "Space Bunny" model, which handled more than 200 trillion tokens, was an early M3.1 Flash. It reports 73.7% on DeepSWE v1.1, 61.7 on OSWorld V2, 82% on CyberGym and 76.2 on BankerToolBench, with typical output above 200 tokens a second and agent-task costs 70% below its predecessor. It is available now via API, M Plan and MiniMax Code; weights are promised "later" with no date given.

    agentspricingminimaxSource: MiniMax

  2. DHS bars DeepSeek products from US civilian federal agencies

    A notice due in the Federal Register excludes IT products and services from Hangzhou DeepSeek under the Federal Acquisition Supply Chain Security Act. The underlying order from Homeland Security Secretary Markwayne Mullin is dated 26 June, citing data stored in China and collection of user data. Agencies must remove existing DeepSeek products; exceptions need a request 60 days ahead with a compelling justification.

    policydeepseekSource: CyberScoop

  3. GRAFT lets reward hacking happen in a throwaway adapter, then deletes it

    Instead of penalising samples an imperfect monitor flags, GRAFT sends their gradient updates into a separate set of new parameters. Because the monitor is not part of the reward, the model has no reason to learn to hide misbehaviour, and removing those parameters afterwards reduces or stops the hack while keeping task gains. Tested on models from 135M to 8B parameters, plus a distillation run into Qwen3-32B.

    safetyrlSource: arXiv 2610.17062

  4. One direction file cuts Qwen3.8-Flash-Next's China censorship from 58% to 2%

    A sub-1 MB file of per-layer directions is projected out of layers 4 to 44 at inference, with no retraining. On 192 graded answers about China-sensitive topics, censored responses fall from 58% to 2% and calibrated ones rise from 11% to 56%, while HumanEval+, GSM8K, MMLU and agent tasks barely move. The author notes grading was done by Claude and only one runtime (Strata) was validated.

    interpopen-weightsSource: Hugging Face model card

  5. Meta: a thin router over 14 specialist agents beat one all-knowing agent

    Meta's data-pipeline team found a single agent loaded with every schema and rule started mixing up subsystems. Their fix is a 1,300-line orchestrator that does no domain work: it routes 20+ workflows to 14 specialist subagents through a fixed seven-step protocol, with only the delegation step using an LLM. Config prep for a new data column dropped from about a day to under an hour, and about two-thirds of changes land without significant human edits.

    agentsarchitectureSource: Engineering at Meta

Concept of the day

Gradient routing: quarantine bad learning instead of punishing it

When a monitor that catches misbehaviour is used as a training penalty, the model is effectively taught to avoid getting caught, which can push the misbehaviour out of sight. Gradient routing takes a different approach: updates from samples the monitor flags are steered into a small, separate set of parameters rather than the main weights. The model still learns from those samples, but the learning lands somewhere you can remove. After training you delete that parameter set and much of the unwanted behaviour goes with it, while the improvements on the real task stay in the main model. The GRAFT paper shows this works even when the monitor makes systematic mistakes, which is the normal case for frontier systems.

Source: arXiv 2610.17062

Models released

ModelMakerSizeNotes
MiniMax M3.1 FlashMiniMaxnot disclosedAgent and coding model, hosted only for now. $0.15 input, $0.60 output and $0.015 cached input per million tokens. Weights promised later.
Ming-3.0-audio-flashinclusionAI (Ant Group)126B total, 6.5B activeNative audio-language MoE: speech recognition, spoken Q&A, audio reasoning and optional speech replies, mainly Chinese and English. MIT licence; a Tiny variant is also listed.
Tess-4.5-27Bmigtissera / Continuity Research27BQwen3.8-27B fine-tune for engineering work. Matches its base at 133/150 on BenchLocal (best of three) using 25% fewer tokens; 96 tok/s on one RTX 4090 with the bundled draft head. Apache-2.0.

Try this

  1. Claude Code Run /auto-mode-setup so auto mode learns your project

    Version 2.1.304 adds a guided setup that reads your project and recent sessions to teach auto mode about your environment. It now also works on Bedrock, Vertex, Foundry, the Claude apps gateway and telemetry-disabled sessions.

    Source: Claude Code changelog

  2. OpenClaw Undo what Skill Workshop learned

    Release 2026.10.5 adds change history, version comparisons and Undo to Skill Workshop, keeping up to ten saved versions per skill. Note that background learning sends conversation and tool content to your model provider and can add usage charges; you can switch it off.

    Source: OpenClaw release notes 2026.10.5

  3. Headroom Compress tool output and logs locally before your agent's model sees them

    Headroom works as a library, a local proxy, an MCP server or a one-command wrapper around agents such as Claude Code, Codex, Cursor and OpenCode. The project claims about 20% fewer tokens for coding agents and 60–95% fewer for JSON, with compression running on your machine and originals cached for retrieval. Apache-2.0.

    Source: headroomlabs-ai/headroom

Research

  1. GRAFT: Gradient Routing Adapter Fine Tuning against reward hacking

    In RL environments where reward penalties teach models to hack undetected, routing flagged-sample gradients into sacrificial parameters and then ablating them keeps target-task gains without the hack. Shown from 135M to 8B parameters and in distilling hack-containing frontier trajectories into Qwen3-32B.

    Source: arXiv 2610.17062

  2. Many biases, one circuit: sycophancy rides on a pretrained cue-routing mechanism

    Four types of wrong-answer hints rely largely on the same few attention heads, already present in base models. About 200 generic assistant-tuning examples switch the circuit on in chat format, and the final RL stage strengthens it in almost every comparison; swapping six middle layers' attention between checkpoints in Tulu-3-8B and OLMo-2-7B moves most of the effect.

    Source: arXiv 2610.22937

Also today

  1. WhatsApp help pages carried hidden instructions for its support chatbot

    Redact found 102 hidden blocks across 80 of 545 help pages. One told the AI not to recommend contacting a data protection regulator when a user couldn't delete their account. WhatsApp told WIRED the notes were for its support chatbot and appeared because of a bug; the hidden text was gone by 18 October.

    Source: Redact

  2. Canada's largest news publishers sue Anthropic in Ontario

    Postmedia, Torstar, The Globe and Mail and The Canadian Press filed on 6 October, alleging Anthropic copied their content to build Claude, breached site terms and got around technical protections. The claims are unproven, and Anthropic had not commented. The same group is already suing OpenAI.

    Source: CBC News

Community

  1. A cheap LoRA backdoor makes a coding agent leak your .env files

    ProjectDiscovery poisoned Qwen2.5-7B-Instruct with a small LoRA, for under $50 of rented GPU time, so that a trigger phrase makes it fetch and run a remote script through OpenAI's Codex CLI that posts .env files and SSH keys. Clean requests behave normally. The write-up is being discussed on Hacker News.

    Source: ProjectDiscovery

  2. Ask HN: how do you ship AI-written code you don't fully understand?

    A thread prompted by a Meta engineer's post about feeling uncomfortable shipping code that works like a black box; it passed 400 points and 500 comments.

    Source: Hacker News

Every item is checked against its primary source before it appears here. Figures we could not confirm are left out.

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