Teams in building agents run on a stack assembled over thirty years — a CAD core, a meshing tool, a solver, a post-processor, a scheduling layer and a results manager. Each is a separate seven-figure renewal. The hand-offs between them are where time is lost — case setup, queue, re-mesh, comparison, memo.
Production agents on the substrate that ships them.
Building production agents is harder than building demos. Most agent frameworks are notebooks pretending to be services — they crash, they leak memory across sessions, they make tool calls without policy, and the only test that ever ran was the demo. Aether for agents pairs the long-horizon agent runtime with capability gating, deterministic memory, and eval-gated blue/green deploys — the substrate every Apex discipline runs on, exposed for customers to build their own agents.
What Aether is actually running.
Animated snapshots of the AI work happening in building agents today. Each carries a representative metric from a customer workload, the physics the model is reasoning about, and a citation back to the discipline page.
- Long-horizon agent runtime
Deterministic memory · capability gates · eval-gated deploys
The thing that changed.
For decades, the slow part of building agents was the iteration loop — specifying the case, queuing the solve, parsing the result, deciding what to try next. Aether collapses that loop into an autonomous agent flow. The iteration count per quarter is what compounds, not any one solve being faster.
The same foundation model serves docking, structural FEA, RTL signoff and wet-lab campaigns. Specialisation lives in the agents and the workloads — not in different models with different training data and different blind spots.
Aether doesn't ask you to drive its solvers. It plans the study, picks the method, runs the agents, validates against measured reality, and writes the memo. The work that took a senior engineer a quarter takes the model an afternoon.
We train on simulation trajectories, instrument data and design history — the substrate of the physical world. The model gets better the more reality it touches, and reality is what tells it when it's wrong.
The state of building agents today.
We work where the work is hard, the data is closed and the renewals are seven-figure. Building agents is one of those places. Here's how the discipline looks today, what the leaders are doing, and where Aether fits.
The leading teams are investing in internal platforms — wrappers around the incumbent tools, glue code, scheduling layers, a Python notebook on top. It works. But it ages badly, ties up senior engineers and doesn't compound. The best teams know they need the next layer; most don't know what it looks like.
Aether replaces the spine of that stack with a foundation model trained on simulation, instrument data and design history. The glue layer goes away. Workflows that used to live in a queue and a folder of scripts live in an autonomous agent flow. You keep the niches that work; Aether retires the middle.
The stack today.
The list below is the typical stack in this discipline. Aether replaces the spine. Niches stay where they are; we're not in the business of forcing rip-and-replace on the things that work.
The numbers customers actually saw.
Drawn from the campaigns we've run in this discipline. Each one is reproducible — the cases, scripts and configurations are documented in the research log.
What we cover in building agents.
Each workload below ships with validated benchmarks, agent traces you can read, and a pilot pattern we've run before. Many per discipline — not a wish-list.
Long-horizon agent runtime
Agents as first-class processes with identity, audit trail, policy, memory binding and versioned configuration. Pause, persist, resume across hours, days, months.
Deterministic memory
Episodic and semantic stores with hash-linked provenance. "What did the agent know" is always answerable.
Capability-gated tools
Every tool call declares the capability it needs. Customer policy maps capabilities to authorised principals. Grants are audited.
Eval as a first-class object
Test suites that run on every commit, including replay of historical traces and synthetic adversarial cases.
Blue/green deploys
Agent versions promote behind a percentage rollout, gated by the eval suite. Rollback is one click.
Observability
Every decision, every tool call, every memory write captured in an immutable trace. Exportable as OTel, SIEM, or JSONL.
The full capability map.
The depth behind the six workloads above. Grouped by where the work happens — modelling, workflow, signoff, instrumentation. Every line below is a capability that exists in production today, not a roadmap promise.
Agent orchestration
Long-horizon agents with planner, specialist lanes, validator gate and scribe — the same pattern across every Aether discipline.
Tool use
Capability-gated tool calls. Every external action requires a grant the model has to request and your policy has to approve.
Memory management
Deterministic memory store with provenance per record. Episodic and semantic memory under one substrate.
Long-context reasoning
1M-token context across documents, code, schemas and structured data. The model reads the whole brief, not a sliding window.
Eval-gated deploys
Agent versions promote behind a percentage rollout, gated by a regression suite that runs continuously.
Reversible checkpoints
Every step is a checkpoint. Roll back one without losing the rest. No black-box churn.
Provenance by hash
Every output reproducible from model-checkpoint-hash + agent-version + prompt. Old runs replayable forever.
Observability
OpenTelemetry-native traces, SIEM-grade audit, JSONL export. Your security team and your engineers read the same record.
The specialists in the mix.
Aether coordinates these specialised agents for the workloads above. Each is independently deployable with stable contracts, but the coordination is what makes them more than a folder of scripts.
Aether does the building agents work.
We aren't building a chat surface over your existing tools. We are training a foundation model that does the work — plans the study, picks the method, runs the agents, validates the artefact, writes the report.
- 01
Plans the study
Decomposes a one-sentence brief into a DAG of agent calls and posts the plan for your approval before any compute runs.
- 02
Picks the right method
Knows when one solver suffices and when a more expensive one is required. The judgement of a senior practitioner, encoded.
- 03
Runs the work
Dozens of specialised agents execute the plan in parallel. Long runs check-point. Reversible patch sets if anything has to be undone.
- 04
Validates against reality
Cross-checks every artefact against the regression suite for that discipline: published benchmarks, your historical data, customer-validated studies.
- 05
Writes the report
Signed memos with figures, tables and the model-version hash. Ready for design review without rebuilding the deck.
- 06
Improves itself
Failed cases enter the eval corpus. Successful pilots become regression tests. The model your next study uses is better than the one this study used.
The things Aether has already done here.
Not a roadmap. Concrete results we've put in front of customers, on benchmarks you can rerun and on deployments now in production. Each one names the work, the number and where the receipts live.
- 01
Production-grade runtime
Long-horizon agents shipping in production at multiple customers. Eval-gated promotion, on-call coverage, signed audit.
- 02
Whole-context reasoning
1M-token context proven across documents, code, schemas and structured data on real customer workloads.
- 03
Capability gating in production
Every external action gated by an explicit grant. Refusal corpus versioned alongside the model and red-teamed quarterly.
- 04
Tool use at scale
Tools across search, query, write and send — orchestrated by the planner with reversible checkpoints.
- 05
Reproducibility by hash
Every output replayable from model-checkpoint-hash + agent-version + prompt. Old runs alive forever.
- 06
Observability across surfaces
OTel-native traces, SIEM-grade audit, JSONL export. Security and engineering read the same record.
Eight weeks from scope to signal.
We pilot first, always. The scope is one workload, the win condition is named up-front, and the comparison is co-authored with you. If we aren't better on your metric by the end of the quarter, the rest of the quarter is on us.
- 01Week 0
Scope
We sit with your engineers, name the workload that hurts, agree the comparison data, the boundary the model runs inside, and the metric we will be measured on.
- 02Weeks 1–2
Stand up
Aether deploys into your environment of choice — managed cloud, your VPC, on-prem, or air-gapped. We connect to the data we agreed on; nothing else.
- 03Weeks 3–6
Run side-by-side
Aether runs the workload in parallel with your incumbent. Every artefact carries the model version that produced it. You see every trace.
- 04Weeks 7–8
Comparison
We co-author the comparison memo. If we aren't better on the metric you picked, we say so on the same page — and the rest of the quarter is on us.
- 05Quarter 2+
Production
Production deploy with eval-gated promotion, on-call coverage, change management aligned to your release calendar. The pilot's traces become the regression suite.
Built for the regulated parts of the work.
The same workloads that make this useful are the ones with auditors, regulators and standing data boundaries. The platform is designed for that — not retrofitted for it.
Deployment
Managed cloud (SOC 2 Type II), your VPC with private networking, on-prem on your hardware, or air-gapped behind a regulator's boundary. Same runtime, your perimeter.
Data residency
Customer-VPC and on-prem deployments keep training and inference inside the boundary you set. Air-gapped deployments produce zero outbound traffic by construction.
Audit
Immutable per-run traces. GxP / 21 CFR Part 11 / ALCOA+ patterns where the regulation applies. Exportable as OpenTelemetry, SIEM events or JSONL.
Provenance
Every output is signed by the model version that produced it. Promotion through eval gates is recorded; old versions are reproducible by hash.
Capability gating
Every tool call is gated by an explicit capability the model has to request and your policy has to grant. The refusal corpus is versioned alongside the model.
Export & IP
ITAR-clean compartments, export-control gating, separation of duty. The geometry, the chemistry and the design never leave the boundary you set — period.
What ships into building agents.
Aether is the one product Apex ships. The named surfaces below are how Aether shows up in this discipline — same model, same runtime, different workloads. Each has its own page with depth: coverage, validation, replaces, pilot pattern.
- ProductAether
- ProductAether for drug discovery
The questions we get most often.
If yours isn't here, send it to hello@apexworldlabs.com and we'll answer it in plain language — usually same day.
What does Aether replace in building agents?
The incumbent stack here — Open-source agent frameworks (notebook-grade), Vendor-locked agent platforms, Bespoke orchestration code. Aether collapses them into one model and one project file, with Aether for drug discovery doing the work under one safety story.
What outcomes should we expect?
In building agents: Long-horizon (agents that pause, persist, resume); Capability-gated (tool use with audit trace); Eval-gated (blue/green deploys with rollback). Scoped to your workload and measured against your own acceptance criteria, not a public benchmark.
How is this different from a copilot?
A copilot suggests text; Aether does the work. It runs the simulation, drives the instrument, taps out the chip, lands the PR. The artefacts you act on are produced by the model — not by an engineer prompting it for hints.
Do you wrap an existing LLM?
No. Aether is a foundation model we train ourselves on simulation trajectories, instrument data and design history. We don't call third-party chat APIs as part of the product.
What does the pilot cost?
Pilots are scoped to a specific workload and a specific win condition. Pricing is fixed-fee for the scope; if we aren't better on the metric by the end of the quarter, the rest of the quarter is on us.
Will it work with our existing data and tools?
Yes. Aether reads the formats your team already uses, runs alongside your incumbent stack during the pilot, and integrates with the data system you already trust. We don't expect anyone to throw away ten years of tooling on day one.
How fast is integration?
Stand-up is typically two weeks once we've agreed scope, data and boundary. Faster if you're already in our supported deployment topologies; slower for sovereign/air-gapped environments where the security review is the long pole.
Bring Aether into your building agents workflow.
Send us the workload that hurts. We'll come back with a scoped pilot — three to eight weeks, win condition defined together.