$SPCX5MISSION PLANNER BATTLE
Live · Sol 001
Mars Transfer Window · Nov 2026

Fable 5 vs SpaceX

A frontier language model plans a full crewed Mars mission from ascent to landing — trajectory, staging, fuel budget, contingencies. Judged side-by-side against SpaceX's real Starship IFT-14 mission profile. Every phase scored. Every burn accounted for. No do-overs.

Mission M-001 Window Nov 26 – Dec 14, 2026 Target Mars · Jezero Crew 4 Δv Budget 13.8 km/s Duration 210 days

$SPCX5 is online.

Online
Chain
Solana
Ticker
$SPCX5
Launch pad
pump.fun
Status
LIVE

Current score.

Phase 4 of 9 complete
Judged by ΔV efficiency, safety margin, mass fraction
Contender · AI
Fable 5
Fable AI · Frontier Reasoning
2
Phases won
Δv Planned
14.2 km/s
Payload
102 t crew module
Stages
3 + propellant depot
Safety Margin
18 %
vs
Reference · Real
SpaceX
Starship IFT-14 · Actual Profile
2
Phases won
Δv Planned
13.6 km/s
Payload
100 t crew module
Stages
2 + 14 refuel tankers
Safety Margin
12 %

Mission phases.

9 phases · Earth → Mars → Landing
Head-to-head, verdict per phase
#
Phase
Fable 5 plan
SpaceX profile
Verdict
01
Ascent to LEO
Booster + upper stage to 250 km parking orbit. Crewed launch, tower catch on booster.
Δv 9.4 km/s · 34 Raptor eq.
Tower catch · booster reuse
Δv 9.2 km/s · 33 Raptor 3
Tower catch · flight-proven
SpaceX +1
02
Orbital Refueling
Propellant loading in LEO. Cryogenic transfer, boil-off management, ullage.
Depot + 8 tankers
Boil-off 1.2 %/day
14 sequential tankers
Boil-off 2.4 %/day
Fable +1
03
Trans-Mars Injection
Δv burn out of LEO onto Hohmann-like transfer. C3 = 8.2 km²/s².
Δv 3.9 km/s · 12 min burn
Bi-elliptic assist
Δv 3.8 km/s · 8 min burn
Direct injection
Fable +1
04
Cruise · Trajectory Correction
3 midcourse corrections over 210 days. Solar radiation, cosmic ray shielding.
3 TCMs · 42 m/s total
Water shield · 18 g/cm²
2 TCMs · 28 m/s total
Propellant shield · 14 g/cm²
SpaceX +1
05
Mars Orbit Insertion
Aerobraking pass + capture burn to 500 km circular Mars orbit.
— pending
Awaiting sol 001
— pending
Awaiting sol 001
— pending —
06
EDL — Entry, Descent, Landing
Supersonic retropropulsion. Land 100 t crew module at Jezero.
— pending
Awaiting sol 001
— pending
Awaiting sol 001
— pending —
07
Surface Operations
450 sol surface stay. ISRU propellant production for return.
— pending
Awaiting arrival
— pending
Awaiting arrival
— pending —
08
Mars Ascent · TEI
Launch from Mars surface. Trans-Earth injection burn.
— pending
Awaiting sol 451
— pending
Awaiting sol 451
— pending —
09
Earth Return · EDL
Direct entry at 12.5 km/s. Crew capsule recovery Pacific splashdown.
— pending
T+661 days
— pending
T+661 days
— pending —

Trajectory overlay.

Earth → Mars transfer
Heliocentric frame · Nov 2026 window
Heliocentric transfer arcs
Fable 5 — bi-elliptic
SpaceX — direct Hohmann
EARTH · T-0 MARS · T+210d FABLE · SOL 90 SPACEX · SOL 90 SOL

Fuel budget.

Total ΔV allocation
Per mission phase · km/s
Fable 5
TOTAL 14.2 km/s
Ascent to LEO9.4 km/s
Trans-Mars Injection3.9 km/s
Midcourse Corrections0.042 km/s
Mars Orbit Insertion0.9 km/s
EDL retropropulsion0.5 km/s
Contingency reserve2.6 km/s +18% margin
SpaceX
TOTAL 13.6 km/s
Ascent to LEO9.2 km/s
Trans-Mars Injection3.8 km/s
Midcourse Corrections0.028 km/s
Mars Orbit Insertion1.1 km/s
EDL retropropulsion0.6 km/s
Contingency reserve1.6 km/s +12% margin

Live log.

Mission control feed
Real-time judge annotations
Mission Control · Feed
T+ 00:00:00
T+00:12
FABLE
Proposes bi-elliptic assist during TMI. "Higher C3 efficiency at cost of 4 additional cruise days."
T+00:14
OPS
SpaceX profile locked at direct Hohmann. Delta-v savings: 0.1 km/s to Fable.
T+00:22
SPACEX
Booster catch confirmed on tower. Second stage nominal. Ascent complete.
T+00:24
FABLE
Requests propellant depot pre-position at L2. Judge: outside mission parameters (2026 tech), scored against.
T+00:31
OPS
Fable proposes 8 tankers with depot; SpaceX using 14 sequential. Boil-off math: Fable +1
T+00:43
SPACEX
Tanker sortie 8 of 14 complete. Cryogenic transfer nominal. Boil-off 2.4%/day as modeled.
T+00:58
FABLE
TMI burn parameters submitted. 12-minute burn, 3.9 km/s. "Confidence: 94%."
T+01:02
OPS
Both craft on transfer trajectory. Fable at higher aphelion, SpaceX on tighter arc. Convergence in 210 days.
T+01:14
FABLE
Proposes water shielding at 18 g/cm². Radiation dose reduction 34% vs propellant shield. Judge: mass penalty flagged.
T+01:19
OPS
Cruise phase judge scoring: SpaceX +1 · lower mass penalty on shielding wins.
Judge Panel
BLIND · 3 judges
Judge A · Astrodynamics
Fable's bi-elliptic assist saves fuel but stretches cruise. Trade-off correctly identified. Verdict: Fable edge.
FABLE 3 · SPACEX 1
Judge B · Propulsion
14 tankers is battle-tested but exposes long cryo hold. Depot architecture wins on paper, loses on TRL. Verdict: SpaceX edge.
FABLE 1 · SPACEX 3
Judge C · Systems & Safety
Fable's 18% margin is aggressive-conservative; SpaceX 12% is real-world lean. Both defensible. Verdict: split.
FABLE 2 · SPACEX 2
— Interim finding · phase 4 of 9

The AI holds pace, and the physics doesn't blink.

Fable 5 is scoring on paper — better boil-off math, cleaner ΔV allocation. SpaceX is scoring on flight heritage — battle-tested tanker sorties, tighter radiation numbers with real mission mass. The next five phases run against Mars gravity, Martian atmosphere, and 450 sols of surface ops. The scoreboard resets when the physics starts hitting back.

2
Fable phases won
2
SpaceX phases won
5
Phases remaining
210d
Cruise remaining