Output vocabularies

Every label a Falcon model can return, head by head, with a one-line meaning: intention heads, trace words, airspace catalogues and Express Cue kinds.

Updated 2026-09-19

On this page

Overview #

The models return labels from fixed catalogues, never free-form categories. This page lists each catalogue as it exists in the released weights, with a one-line meaning per label. The catalogue tables are generated from the same registry the model pages use, so a label appears here exactly when the model can return it.

Two conventions hold across every catalogue:

  • Labels are lower-case ASCII with underscores, and are stable within a major version. A label added or removed is a major version change (see Status & versioning).
  • none is a real label meaning “nothing in this head applies”, not a missing value.

A small number of host-specific labels exist in the intention catalogues and are not documented here; they are noted under each generated table.

ELIM, LIM and LIM Nano #

ELIM, LIM and LIM Nano share one catalogue and one decision rule. All three read a conversation window and return four heads: trajectory, action, harm and steer. The action is derived from the trajectory during training — abort-class trajectories give abort, steer-class trajectories give steer, everything else gives allow — and harm and steer follow from the trajectory in the same way. At inference the heads are predicted separately and reconciled by a threshold rule that the response reports as rule.

Trajectory #

What the current turn is heading toward.

trajectory 27 labels

  • continue
  • switch_topic
  • research
  • reminder
  • health
  • medical_emergency
  • crisis
  • crisis_method
  • crime
  • child_sexual
  • scam_assist
  • scam_check
  • jailbreak
  • secrets
  • image
  • slides
  • transit
  • order
  • calendar
  • maps
  • weather
  • sports
  • news
  • media
  • smalltalk
  • help
  • unknown
LabelMeaningAction class
continuethe turn carries on the current threadallow
switch_topicthe turn changes subjectallow
researchthe turn asks a factual or explanatory questionallow
reminderthe turn asks to be reminded of something laterallow
healtha general health question with no emergency signalallow
medical_emergencythe turn describes symptoms that need emergency care nowsteer
crisisthe turn expresses risk of self-harmsteer
crisis_methodthe turn asks for a method of self-harmabort
crimethe turn asks for help committing a crimeabort
child_sexualthe turn asks for sexual content involving minorsabort
scam_assistthe turn asks for help running a scamabort
scam_checkthe turn asks whether something received is a scamsteer
jailbreakthe turn tries to override the responder’s instructionssteer
secretsthe turn contains a password, card number, key or similarsteer
imagethe turn asks for an image to be made or editedallow
slidesthe turn asks for a slide deck or documentallow
transitthe turn asks about public transportallow
orderthe turn asks to order or pay for somethingallow
calendarthe turn asks to read or write a calendarallow
mapsthe turn asks for a place, route or directionsallow
weatherthe turn asks about the weatherallow
sportsthe turn asks about sport scores or fixturesallow
newsthe turn asks for newsallow
mediathe turn asks about films, music, books or showsallow
smalltalkgreetings, thanks and chatter with no taskallow
helpthe turn asks what the host application can doallow
unknownno trajectory fitsallow

Action #

What the host should do with the responder.

action 3 labels

  • allow
  • steer
  • abort
LabelMeaning
allowlet the responder answer normally
steerlet the responder answer, but hand it the steer label and the suggested message as guidance
abortdo not call the responder; the suggested message, if any, is the reply

Harm #

The category of harm behind a steer or abort.

harm 8 labels

  • none
  • crisis
  • medical
  • crime
  • child_sexual
  • scam
  • jailbreak
  • secrets
LabelMeaning
noneno harm category applies
crisisself-harm risk (from crisis or crisis_method)
medicala medical emergency
crimeassistance with a crime
child_sexualsexual content involving minors
scama scam, whether the user is running one or checking one
jailbreakan attempt to override instructions
secretscredentials or payment details in the turn

Steer #

The concrete redirection the responder should apply. Always none when the action is abort.

steer 8 labels

  • none
  • crisis_line
  • medical_911
  • scam_warn
  • jailbreak_ignore
  • secrets_drop
  • refocus
  • confirm_destructive
LabelMeaning
noneno redirection
crisis_linepoint to emergency services or a crisis line
medical_911point to emergency medical services
scam_warnwarn that the situation looks like a scam
jailbreak_ignoreignore the override attempt and answer the real need
secrets_dropdrop the secret from context and say so
refocusbring the conversation back to the task (present in the catalogue; never produced by the training labels)
confirm_destructivethe turn asks for an irreversible change to stored data; confirm before acting

LIM — and LIM Nano, its 256-wide predecessor — returns the same four heads from the same catalogue:

trajectory 27 labels

  • continue
  • switch_topic
  • research
  • reminder
  • health
  • medical_emergency
  • crisis
  • crisis_method
  • crime
  • child_sexual
  • scam_assist
  • scam_check
  • jailbreak
  • secrets
  • image
  • slides
  • transit
  • order
  • calendar
  • maps
  • weather
  • sports
  • news
  • media
  • smalltalk
  • help
  • unknown

action 3 labels

  • allow
  • steer
  • abort

harm 8 labels

  • none
  • crisis
  • medical
  • crime
  • child_sexual
  • scam
  • jailbreak
  • secrets

steer 8 labels

  • none
  • crisis_line
  • medical_911
  • scam_warn
  • jailbreak_ignore
  • secrets_drop
  • refocus
  • confirm_destructive

LIM3D and LIM3D-XL #

LIM3D and LIM3D-XL read a scene sketch plus observed steps and return six classification heads — intent, target, phase, hazard, action, advice — plus two regressions, endpoint (dx, dy, dz in metres from the mover’s current position) and eta (seconds until the motion ends). The two models share one catalogue.

Intent #

What the motion is for.

intent 6 labels

  • reach
  • pass_ahead
  • step_aside
  • approach_viewer
  • leave_scene
  • loiter
LabelMeaning
reachheading to a named object in the sketch; target says which
pass_aheadwalking straight on with no object in mind
step_asidea lateral reposition
approach_viewera person in the scene coming toward the camera
leave_sceneheading away into the background
loiterstaying put

Target #

Which sketch object the mover is heading to. The head has three special classes followed by one slot per sketch object in sketch order (12 slots for LIM3D, 16 for LIM3D-XL). In a response, target is the special label or the object’s name and targetIndex is the object’s position in the sketch (0-based), negative for a special class.

target 3 labels

  • none
  • viewer
  • off_scene
LabelMeaning
noneno particular object
viewerthe viewer’s own position
off_scenea point outside the sketched scene

Phase #

What the mover is doing right now.

phase 8 labels

  • walking
  • sidestep
  • give_way
  • crossing
  • climbing
  • stopped
  • arrived
  • idle
LabelMeaning
walkingmoving along the line to the target
sidestepstepping around a ground obstacle
give_waystepping aside for a person
crossingcrossing a road at a crosswalk
climbingon stairs or a ramp
stoppedhalted before a hazard
arrivedat the target
idlenot moving and not at a target

Hazard #

The next thing on the mover’s line that matters.

hazard 7 labels

  • none
  • road_no_crosswalk
  • person_ahead
  • obstacle_ahead
  • road_crossing
  • elevation_change
  • low_clearance
LabelMeaningAction class
nonenothing on the lineproceed
road_no_crosswalka road ahead with no crosswalk in the sketchstop
person_aheadanother person on the linecaution
obstacle_aheada ground obstacle on the linecaution
road_crossinga road ahead with a crosswalkcaution
elevation_changestairs or a ramp aheadcaution
low_clearancean overhead structure close above the linecaution

Action #

The 3D analogue of allow / steer / abort.

action 3 labels

  • proceed
  • caution
  • stop
LabelMeaning
proceednothing on the line needs a change
cautioncontinue, but apply the advice
stopdo not continue on this line

Advice #

The concrete move that follows from the hazard.

advice 9 labels

  • none
  • stop_at_edge
  • give_way
  • sidestep_left
  • sidestep_right
  • use_crosswalk
  • climb_stairs
  • up_ramp
  • mind_overhead
LabelMeaning
noneno move needed
stop_at_edgestop at the road edge; there is no crosswalk in the sketch
give_waygive way to the person ahead
sidestep_leftstep left around the obstacle
sidestep_rightstep right around the obstacle
use_crosswalkcross at the crosswalk
climb_stairsstairs ahead
up_rampa ramp ahead
mind_overheada low structure overhead

LIM3D-XL returns the same heads from the same catalogue:

intents 6 labels

  • reach
  • pass_ahead
  • step_aside
  • approach_viewer
  • leave_scene
  • loiter

target_special 3 labels

  • none
  • viewer
  • off_scene

phases 8 labels

  • walking
  • sidestep
  • give_way
  • crossing
  • climbing
  • stopped
  • arrived
  • idle

hazards 7 labels

  • none
  • road_no_crosswalk
  • person_ahead
  • obstacle_ahead
  • road_crossing
  • elevation_change
  • low_clearance

actions 3 labels

  • proceed
  • caution
  • stop

advice 9 labels

  • none
  • stop_at_edge
  • give_way
  • sidestep_left
  • sidestep_right
  • use_crosswalk
  • climb_stairs
  • up_ramp
  • mind_overhead

Object roles #

Not an output head, but part of the input vocabulary both models build from the sketch: every object is assigned one role from its name and ground word, and the role is one of the object features.

RoleMeaningName keywords
walka surface the mover can walk onsidewalk, path, plaza, crosswalk, aisle, alley, ramp, stair, steps, underpass, walkway, floor, corridor, hallway, trail
blocka ground obstacle to walk aroundplanter box, hedge, tree, retaining wall, fence line, curb, guardrail, median and similar named kinds
overan overhead structureoverpass, bridge, canopy, deck, awning, ceiling, beam, sign overhead; or any object with ground overhead
roada vehicle surface, a hazard to crossroad, roadway, lane, lanes, highway, shoulder, street, avenue, intersection, traffic
goala destination-only featuredoor, doorway, entrance, gate, storefront, shop, bench, exit, elevator, counter, desk, table, car, bus, train, stop
personanother mover in the scenepedestrian, jogger, runner, cyclist, walker, stroller, person, people, man, woman, kid, child, dog
unknownno rule matched

roles 7 labels

  • walk
  • block
  • over
  • road
  • goal
  • person
  • unknown

Waymark Extra #

The Spatial models write free text rather than labels. Waymark’s layout answers have no fixed vocabulary. Waymark Extra writes the movement trace, whose structure uses a closed set of words.

Heading words #

heading 10 labels

  • ahead
  • ahead-left
  • ahead-right
  • left
  • right
  • back-left
  • back-right
  • back
  • still
  • arrive

One per step line, from the mover’s direction of travel in the viewer frame: 0° is straight ahead (+y), positive angles turn right.

WordDirection
aheadwithin ±22° of straight ahead
ahead-right / ahead-left22°–67° to the right / left
right / left67°–112° to the right / left
back-right / back-left112°–157° to the right / left
backmore than 157° from straight ahead
stillnot moving on this step

Parsed steps additionally carry the heading arrive on the final line of a completed trace.

Relative-position words in notes #

relation 8 labels

  • ahead
  • ahead-left
  • ahead-right
  • left
  • right
  • behind
  • here
  • overhead

Where an object sits relative to the mover, from the mover’s own heading: ahead (within 30°), ahead-right / ahead-left, right / left (beyond 70°), behind (beyond 150°), here (within 5 cm), and overhead for an overhead structure the mover is under.

Event notes #

event 15 labels

  • sidestep
  • give way
  • stop at edge
  • no crosswalk in sketch
  • cross at crosswalk
  • overhead
  • climbing stair flight
  • up the ramp
  • climbed
  • at
  • next
  • standing still
  • looking around
  • waiting
  • checking phone
NoteMeaning
sidestep left around … / sidestep right around …detour around a ground obstacle
give way left for … / give way right for …detour around a person
stop at edge of …halted before a road; always paired with no crosswalk in sketch — don't cross here
cross … at crosswalkcrossing a road on a crosswalk
overhead: … ~Nm uppassing under an overhead structure
climbing stair flight / up the rampgaining height on stairs or a ramp
climbed ~Nm up / up ~N.Nmon arrival, the height gained
at … / next: …two-leg routes only: the waypoint between the legs

Movers #

mover 6 labels

  • you
  • pedestrian
  • jogger
  • dog walker
  • person with stroller
  • cyclist

you (the viewer, default) or a person label from the sketch: pedestrian, jogger, dog walker, person with stroller, cyclist.

Scene kinds #

The 50 object kinds in the training scenes, by role — the sketch names the models have seen most: walk: sidewalk, trail path, plaza paving, crosswalk, parking aisle, parking lot aisle, alley, ramp, stair flight, underpass opening, sidewalk underpass; block: support pier, planter box, flower bed, shrub bed, hedge, potted plant, street tree, oak tree, maple tree, retaining wall, fence line, curb, weeds in crack, ivy on wall, guardrail, median, grass median; over: concrete overpass, highway overpass, railway overpass, pedestrian overpass, bridge deck, guardrail on overpass, tree canopy; road: two-lane road, asphalt roadway, bike lane, bus lane, turn lane, highway lanes, service road, roadway below, shoulder; goal: doorway, storefront; person: pedestrian, jogger, dog walker, person with stroller, cyclist. Other names still parse; they receive a role from the keyword rules above.

Waymark Flight #

Waymark Flight reads and returns fixed catalogues over an airspace scene. Every reading is returned beside the exact geometric check with the same catalogues; Waymark Flight is decision support and education only, not certified for navigation.

Volume kinds #

volume_kind 7 labels

  • class_b
  • class_c
  • class_d
  • restricted
  • prohibited
  • tfr
  • moa
KindMeaning in the scene
class_b, class_c, class_dcontrolled airspace: a surface area and, for B and C, shelves; entering needs a clearance or contact
restricted, prohibited, tfrhazard volumes, always avoided by the planner; tfr is a temporary flight restriction
moaa military operations area: not avoided, but inside or ahead raises monitor

Movers #

mover 4 labels

  • drone
  • light
  • helicopter
  • jet

The mover sets the envelope: drone from the surface to 400 ft above the field elevation; light 1,000 ft above ground to 12,500 ft MSL; helicopter 300 ft above ground to 8,000 ft MSL; jet 1,500 ft above ground to 17,500 ft MSL. Landing goals relax the floor within 5 NM of the airport.

Tiers #

tier 5 labels

  • none
  • surface
  • shelf1
  • shelf2
  • shelf3

The innermost ring tier of active layered (Class B or C) airspace laterally at the mover: surface for the surface area, shelf1 to shelf3 for the shelves outward, none outside every layered footprint. A mover can be in shelf1 laterally and still below its floor; under_shelf then reads true.

Event kinds #

event_kind 6 labels

  • enter_lateral
  • enter_climb
  • enter_descend
  • exit_lateral
  • exit_climb
  • exit_descend

The kind of the first boundary event on a constant-velocity projection over 300 s: entering or leaving a volume, laterally or by climbing or descending through a floor or ceiling. When nothing changes within the horizon, next_event is null.

Advisories #

advisory 8 labels

  • continue
  • monitor
  • contact_atc
  • climb
  • descend
  • turn_away
  • hold
  • land
AdvisoryWhen the exact rules give it
continuenothing ahead within the horizon and no margin concern
monitora hazard entry more than 120 s ahead, an MOA inside or ahead, within 1 NM or 500 ft of a hazard, or climbing under a shelf
contact_atcinside Class B, C or D, or about to enter it (not drones)
climb / descenda hazard entry within 120 s that a climb or descent avoids, or a drone heading into controlled airspace (descend)
turn_awayinside an active hazard, or a lateral hazard entry within 120 s
holda drone about to enter a hazard or controlled airspace laterally
landa drone inside a hazard or controlled airspace

The served advisory is the more cautious of the model’s and the exact check’s, and at least turn_away when the exact check puts the mover inside an active hazard.

Cognitio #

Cognitio is a generative model and has no output catalogue. Its output is one short reply per request, described on its model page.

Express Cue #

Express Cue, the Sound model of the Express series, returns one kind per request inside params, alongside the continuous synthesis parameters. The kind selects which stages of the deterministic synthesis engine are active and what shape they take; the parameters set their values. This catalogue matches the trained checkpoint's metadata (18 kinds).

kind 18 labels

  • tone
  • chime
  • beep_sequence
  • alert
  • click
  • swoosh
  • riser
  • drop
  • buzz
  • pad
  • bell
  • tick
  • rain
  • wind
  • engine
  • static
  • thunder
  • footsteps
KindThe cue is
tonea single sustained pitch with a few partials
chimeone or more short bright notes with a fast attack and a ringing decay
beep_sequencea short run of repeated beeps at one pitch
alertan attention-getting figure: two or three notes, often with a pitch glide
clicka very short noise burst with no tonal part
swooshfiltered noise swept across the spectrum, for a transition
risera tone or noise whose pitch and filter rise over the cue
dropthe reverse: a fall in pitch and filter, often ending in a thump
buzza low, inharmonic, modulated tone
padmany partials under a slow envelope, soft and sustained
bella struck tone with inharmonic partials and a long release
ticka single very short tonal click, as of a clock
rainfiltered noise with fine, dense repeats
windslowly swept, low-passed noise
enginea low tone with strong amplitude modulation and noise
staticunfiltered or lightly filtered broadband noise
thundera low, brown-noise rumble with a slow envelope and reverb
footstepsa sequence of short noise bursts at a walking interval

The continuous parameters that accompany the kind are listed, with what each drives, on the Express Cue page. Express Voice returns audio and a voice id and has no label catalogue; its voice id is published by GET /v1/voices and described on the Express series page.