What are the details of Claude AI’s new electronic hardware design capabilities?

On 9 November 2026, Anthropic said Claude Fable 5.2 had designed three electronic devices that Diode Computers then built and that worked without electrical changes: a USB speakerphone, a home voice-assistant hub, and a handheld virtual pet.

What are the details of Claude AI’s new electronic hardware design capabilities? Anthropic has published this as one research collaboration with a circuit-board maker. The devices are early prototypes. Figures below are as of 10 November 2026. Bdeb Technology has not built or tested these boards.

What are the details of Claude AI’s new electronic hardware design capabilities?

The detailed account is Anthropic’s 9 November research post. A shorter account sits in the same-day launch note for Fable 5.2 and Mythos 5.2. Anthropic says it has a commercial relationship with Diode, and that its engineers have worked with Diode’s electrical engineers on circuit-board design since 2025. A year earlier, the models in that work could not reliably lay out a board or design parts that fit together.

The three prototypes

Device	What Anthropic asked for	What it reports
USB speakerphone	A puck that plugs into a computer over USB-C, with microphones, a speaker, Bluetooth, and an antenna printed on the board	Four-layer board, 3D-printed enclosure, firmware. Still working after weeks of use
Home voice-assistant hub	A home voice-assistant hub. Anthropic does not quote the prompt	Four-layer board with USB, Ethernet, and a 100-pin connector, plus a wedge-shaped case. Still in good working order
Handheld virtual pet	A handheld virtual pet. Anthropic does not quote the prompt. Its caption calls the finished device battery-powered	Same path from brief to firmware. Still in good working order. A datasheet check covered running it with no battery

Anthropic quotes the speakerphone brief in full: “a puck that plugs into a computer over USB-C and includes microphones and a speaker, supporting Bluetooth with a PCB antenna.” It does not quote a full brief for the hub or the pet. The launch note says each device got a one-paragraph prompt, that parts were chosen from stock at US distributors, that every board had four copper layers, and that each board was ready to manufacture in under a day.

What the model produced

For each device, Fable 5.2 wrote the specifications, drew the schematics, placed the parts on the board, routed the copper, modeled a 3D-printable enclosure, wrote the firmware, and prepared a parts list. Diode assembled the boards and ran the firmware, with the model directing the engineers. Anthropic says the three boards were manufactured straight from those files, with no round of factory changes, and that the Diode team was surprised by that. All three devices worked without electrical modifications.

Layout, and the scores Anthropic published

Anthropic says the gain over its earlier tests is geometric reasoning: where parts sit, and how the copper joins them. Earlier models put supporting parts too far from the chips they serve, or turned connectors the wrong way. Fable 5.2 made tighter layouts and routed the important connections first, meaning high-speed signals, high current, and tracks that pick up noise. On the hub it routed USB and Ethernet first. Those signals travel as pairs of tracks. It routed one pair at a time, kept the two tracks in a pair the same length and correctly spaced, and added small zigzags so the signals arrive together. It also rearranged the power-supply parts to make that circuit more efficient.

On the speakerphone, copper electrodes under a touch wheel sense a finger. A hole through that area would cut an electrode, so the model kept each signal under the wheel on a single layer and chose pin assignments so those tracks did not have to cross. It also kept the area around the Bluetooth antenna clear of other copper and holes on every layer. On the hub it added grounded copper on the power layer behind most of the high-speed tracks on the back of the board, to give those signals a nearby return path.

Test	Who runs it	Fable 5.2	Comparison Anthropic gives
PCB Gym. Place parts and route boards whose layouts have been removed	Diode, internal	69 percent	25 percent for Fable 5
BenchCAD 2.1. Match reference geometry and circuits, scored 0 to 100, with tools	Public benchmark, cited by Anthropic	83.5 at Max effort	65.3 for Opus 5.5, and 44.4 for Fable 5.1. The research post calls 83.5 nearly double the Fable 5.1 score

These are Anthropic’s figures, from its own write-ups, not a rerun by Bdeb Technology. PCB Gym is Diode’s internal test. BenchCAD 2.1 is the number in the launch note.

Revising a board instead of forcing it

Anthropic says earlier models rarely redid a layout, even when the placement could not be routed. Over the past year Diode designed many boards with those models that were 95 percent complete and still unusable. Fable 5.2 changed course on its own. On the speakerphone it reassigned signals to different pins on two chips, so the tracks under the touch controls could stay on one layer. When the back of that board got crowded, it swapped signals on interchangeable pins and laid out a corner again, rather than jumping between layers. On the hub it judged the copper too tangled to follow by eye, deleted tracks, and rerouted them dozens of times. One of those redos moved a microphone power track that had looped around a ground ring.

Datasheets, KiCad, and a router it wrote itself

When a choice depended on a particular part, the model read that part’s datasheet. Asked whether the pet would work with no battery, it read the charger datasheet and answered that the device would run on USB power, and that the charging light would flicker, because the charger keeps recharging a small capacitor standing in for the battery. Anthropic says that question was one of the few extra prompts. The rest were short lines such as “clean up the schematic” and “continue”.

Routing started in design software Diode provided, driving the router built into KiCad. That router draws one track at a time between two points the model picks. The hub has long tracks from a 100-pin connector, and the model judged that routing them one by one would take too much step-by-step guidance. It wrote its own router, which divides the board into a grid and searches for a clear path. Anthropic says that router was working in about half an hour, and that each long track then took about a second. When an audio clock track ran too close to the Ethernet tracks, the model changed the router so sensitive tracks got more room.

Enclosures and factory checks

For each enclosure, the model wrote code to check that a 3D model of the board would fit without parts colliding. The speakerphone board could not drop straight into the case, because the mute switch hit the back wall. Tilting the board by about 25 degrees during installation cleared the wall, and that step went into the assembly instructions. For the hub, it calculated that a microphone port 25 mm long would resonate near 3.4 kHz, which it described as inside the voice band. A wedge-shaped case, tall at the back and low at the front, shortened the ports to about 10 mm and moved the resonance to about 8.9 kHz, at the edge of speech frequencies. Firmware for the speakerphone dims a ring of lights as the audio gets louder, so the device stays under a current limit designed into the board.

It also ran design-for-manufacturing checks, which compare the board’s geometry with a factory’s limits, and sourcing checks, which confirm distributors have the parts. It sorted the results into problems to fix and flags to ignore. On the hub, six slivers of solder mask were too thin to manufacture. It widened those openings and did not move any parts. A checker flagged a join between two grounds as an error. The model treated the join as deliberate and left it.

What these prototypes are not

Anthropic says all three are still prototypes. They have not been through electrical validation, antenna tuning, thermal testing, or certification, and they were not designed for mass production. The model was not connected to test equipment or to the machines that make and assemble boards, so engineers at Diode had to build and test the hardware. Anthropic says it does not yet know how the devices will hold up with continued use, or whether they would pass commercial certifications. Its stated next step is denser, faster, more complex boards, checks in simulation, and learning from measurements on finished devices. The same section notes that other labs are working on this kind of design too, and points to an OpenAI write-up about a handheld device. Anthropic does not describe that project further.

Using the same model

Neither post describes a separate hardware-design product, and neither one includes the design files. The run used Diode’s software and KiCad. Fable 5.2 is the generally available model behind the work. Anthropic’s Fable page, as checked on 10 November 2026, offers it to Pro, Max, Ultra, Team, and Enterprise users, and on the Claude Platform as claude-fable-5-2, at $8 per million input tokens and $40 per million output tokens. The same page says the model can engineer electronic devices and design hardware components. That is Anthropic’s description of the model. It is not a claim that a chat prompt returns a factory-ready board. For the coding-agent side of Claude, see where Claude Code fits in a stack and how to set Claude Code up. Claude Code versus Cursor covers a different job, an editor agent rather than a circuit board.

Sources

• Anthropic, Testing Claude on real-world electronics design, 9 November 2026. The three devices, the speakerphone brief, PCB Gym at 69 percent against 25 percent, the KiCad router and the half-hour replacement, the enclosure measurements, the six solder-mask fixes, the factory result, and the prototype limits.
• Anthropic, Introducing Claude Fable 5.2 and Claude Mythos 5.2, 9 November 2026. Four-layer boards, parts from US distributors, under a day to a manufacturable board, no electrical modifications, and BenchCAD 2.1 at 83.5, 65.3, and 44.4.
• Anthropic, Claude Fable, checked 10 November 2026. Plan names, the API model id, the $8 and $40 prices, and the hardware-design description.