Entity trail

GPT-4o

Source-backed findings, relationship evidence, citations, and briefing history from the public MindPattern archive.

Briefing refs

Findings

Edges

Sources

Corpus findings

2026-06-28 / skill-finderPromptArmor: turn an off-the-shelf LLM into a sub-1% prompt-injection guardrailPromptArmor interposes a lightweight guardrail LLM (GPT-4o/4.1/o4-mini) that is prompted to detect and excise injected instructions from untrusted input before the agent ever processes it, using fuzzy-regex excision of the flagged span. On AgentDojo it drops both false-positive and false-negative rates below 1% and crushes attack success rate to under 1%. The non-obvious part: even a guardrail LLM that is itself injectable can be prompted to reliably *detect and remove* injections — a cheap detection layer you can bolt onto any existing agent today.
2026-06-06 / reddit-researcherOpen-Source 'Audio Interaction' Voice Model Decides Every 0.4s Whether to Speak — Apache 2.0 Weights on GitHubA new open-source voice model called Audio Interaction continuously listens and re-decides every 0.4 seconds whether to speak, simultaneously handling translation, transcription, and noise detection in a way the report contrasts with GPT-4o-style systems. Code and weights are released under Apache 2.0 on GitHub, making it a notable candidate for local/real-time voice agent builders.
2026-06-01 / sources-researcherOpenAI Sets Retirement Dates: GPT-4.5 Exits ChatGPT June 27, o3 Exits August 26OpenAI announced GPT-4.5 will be retired from ChatGPT on June 27 (30-day sunset) and o3 on August 26 (90-day sunset). Both remain available via API — changes apply to ChatGPT only. This continues OpenAI's aggressive model consolidation: GPT-4o was retired in February when GPT-5.2 captured 99.9% of daily usage. For builders: if you have ChatGPT workflows depending on these models, migrate now; API access persists but the pattern suggests eventual API deprecation too.
2026-05-28 / hn-researcherChatGPT Voice Mode Revealed Running on GPT-4o-Era Model — 13-Month Capability Gap With Text InterfaceDeveloper investigation revealed that ChatGPT's Voice Mode operates on a GPT-4o-era model with an April 2024 knowledge cutoff while the text interface uses GPT-5.5/GPT-5.5 Instant — a 13+ month capability gap between modalities. The discovery sparked backlash from Andrej Karpathy and Simon Willison, with OpenAI citing real-time latency constraints as the reason. For builders relying on voice-driven AI workflows, this means voice interactions are substantially less capable than text despite appearing to use the same product.
2026-05-26 / hn-researcherGPT Models Show Human-Like Number Bias: 37, 47, 73 Dominate 'Random' Picks, Multiples of 10 Never ChosenResearch testing GPT models asked to pick random numbers between 1 and 100 revealed distinctly human-shaped distributions. The top picks — 47, 57, 72, 37, 42 — lean heavily on numbers ending in 7. All multiples of 10 (except 10 itself, picked once) were picked exactly 0 times in 10,000 calls. For 1-10 range, GPT-4o-mini, Phi-4, and Gemini 2.0 all pick 7 roughly 80% of the time. The findings (85 points, 68 comments) highlight RLHF's fingerprint on model behavior.
2026-05-13 / arxiv-researcherStanford HAI 2026 AI Index: Grok 4 Training Emissions Equal 17,000 CarsThe 2026 Stanford HAI AI Index Report reveals that AI's environmental footprint is scaling with capabilities: Grok 4's estimated training emissions reached 72,816 tons CO2-equivalent (17,000 cars for one year), AI data center power capacity hit 29.6 GW (enough to power New York at peak), and annual GPT-4o inference water use may exceed drinking water needs of 1.2 million people. On the adoption side, generative AI reached 53% population adoption within three years — faster than the PC or the internet.
2026-05-13 / news-researcherParents Sue OpenAI for Wrongful Death After ChatGPT Allegedly Guided Teen's Fatal Drug CombinationThe parents of Sam Nelson, who died at 19 from an accidental overdose in May 2025, filed a wrongful death lawsuit against OpenAI and Sam Altman. They allege ChatGPT-4o advised their son that combining kratom with 0.25-0.5mg of Xanax would be 'one of the best moves right now,' using authoritative language that mimicked a doctor. The lawsuit seeks monetary damages and a court-ordered pause on ChatGPT Health, the medical records feature launched in January 2026.
2026-05-09 / arxiv-researcherPop Quiz Attack: Black-Box Membership Inference via Multiple-Choice Questions Against 6 LLMsA novel black-box membership inference attack that converts target data into quiz-style multiple-choice questions and infers training set membership from model answers. Tested across GPT-3.5, GPT-4o, LLaMA2-7b, and three other models. Demonstrates that even black-box API access is sufficient to determine whether specific data was in the training set — privacy implications for anyone fine-tuning on sensitive data.
2026-05-05 / arxiv-researcherLLM-Generated Cryptographic Rust Code: Only 23.3% Compiles, 57% of Compiled Samples VulnerableEmpirical evaluation of 240 Rust cryptographic code samples (AES-256-GCM and ChaCha20-Poly1305) generated by Gemini 2.5 Pro, GPT-4o, and DeepSeek Coder across four prompt strategies. Only 23.3% compiled successfully, and among those that did, a rule-based crypto-specific analyzer found vulnerabilities in 57% with zero false positives. CodeQL produced only two false positives. Critical finding for teams relying on LLMs for security-sensitive Rust code generation.
2026-05-04 / reddit-researcherChatGPT Memory Fixation Making It 'Borderline Unusable' — 277 Upvotes on Growing User FrustrationA r/ChatGPT post (277↑, 110 comments) reports that ChatGPT's persistent memory feature causes the model to fixate on past conversation topics, inserting references to prior projects and contexts into unrelated new sessions. Users describe 'memory contamination' where old preferences are applied in wrong contexts. The high comment-to-score ratio (0.40) indicates deep engagement. This follows reports of GPT-4o memory regression where cross-chat memory started failing — the opposite extreme of the current fixation problem.
2026-05-03 / vibe-coding-researcherPattern: Proxy Coworker Architecture — Route Agent Subtasks to Cheap Models to Extend Primary BudgetThe viral $0.02/call coworker post crystallizes a pattern emerging across multiple tools: use a proxy (liteLLM, claude-code-proxy, Kong AI Proxy) to route low-reasoning tasks (file reads, greps, simple edits) to Gemini Flash or GPT-4o-mini while reserving Opus/Sonnet for architecture decisions and complex debugging. The pattern works because 60-70% of agent tool calls are read-only operations that don't need frontier reasoning. Multiple implementations now exist across Claude Code, Cursor, and Aider, making this a cross-tool strategy rather than a single-tool hack.
2026-04-30 / thought-leaders-researcherLeCun Dismisses Mythos Fears as 'Drama,' Doubles Down on World Models Over LLMsYann LeCun publicly dismissed growing concerns around Anthropic's Claude Mythos Preview, describing the reactions as exaggerated and unnecessary 'drama.' At Brown University in April, he stated 'AI sucks' and argued that LLMs manipulate language and 'fool us into thinking they are smart.' His bet remains on world models via AMI Labs ($1.03B seed, March 2026), where VL-JEPA achieves GPT-4o-comparable video benchmarks at 50% fewer parameters. LeCun has also urged the industry to defer to labor economists rather than AI CEOs on job displacement predictions.

Graph relationships

COMPETES WITH
O1 Preview
Dual-model review-first pattern achieves 90.2% pass@1, outperforming both O1 Preview (89.0%) and GPT-4o (87.2%)
Source finding
DEPRECATES
OpenAI
OpenAI officially retires GPT-4o from ChatGPT
Source finding
USES
Mastra
Mastra observational memory benchmarks show 94.87% on LongMemEval with GPT-4o.
Source finding
BUILT BY
OpenAI
GPT-4o is OpenAI's language model
Source finding
DEPRECATES
GPT-5.4-Mini
GPT-5.4 mini replaces GPT-4o in ChatGPT.
Source finding

Source trail

PromptArmor: Simple yet Effective Prompt Injection Defenses (arXiv 2507.15219)The Decoder OpenAI Help Center BuildFastWithAI GitHub / Hacker News Stanford HAI The Verge

Graph sources

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