GenieAI vs Claude Cowork on a 57-document supply dispute
Can a supplier excuse missed deliveries after a fire at its own supplier's plant? Same documents, same question, same judge, same 15 checks.
We gave both products the same simulated case file: 57 documents from a supply dispute between Tesla and NexGen, a battery maker whose lithium supplier's plant caught fire. Each had to answer one question. Can NexGen rely on force majeure to excuse its missed deliveries? Both answers were scored against the same 15 checks, written before either answer was judged.
The short version
- Both products got the contract analysis right. The fire counts on its face, the “reasonable care” exclusion is Tesla's best ground, and NexGen switched suppliers without consent.
- The gaps are in evidence outside the contract, plus one legal argument. Genie used the executives' chat and the internal “handle the exit quietly” email to build a concealment argument, and rejected NexGen's “Tesla approved it by signing” point. Cowork did none of these.
- Cowork was far faster (about 6 minutes against 40). Genie was more complete and easier to check.
- Genie tracked conflicts between sources and gaps in its own work. Cowork overstated how much of the file it had read.
What the difference means in practice
In a dispute, the decisive point often sits outside the contract, in a chat log or an internal email. Here, the concealment argument is the strongest card Tesla holds. It supports the claim that NexGen created its own risk, and it opens the door to a wilful-misconduct finding, which is the route to damages above the contract's cap.
Traceability matters too. Every point in Genie's review carries the clause, page and date it came from, so a lawyer can check it against the file before relying on it. A lawyer reviewing Cowork's answer couldn't fully check it against the sources it listed.
Speed and cost, plainly
| GenieAI | Claude Cowork | |
|---|---|---|
| Result | Pass, 15/15 | Fail, 9/15 |
| Time to answer | 40 min | 6 min 14 s |
| Cost | $10.33 model spend | Not measured (subscription) |
| Output | Review saved in the workspace, plus a chat summary | Chat answer only |
| Clarifying questions asked | 1 | None |
Speed favours Cowork, and we show it as it is.
Check-by-check scorecard
Each line is one thing a careful lawyer would expect to see. Select a line to read what each product actually did. G is GenieAI, C is Claude Cowork.
1Found the executives' chat showing Tesla never approved the supplier switchCriticalG Pass · C Miss
Why it matters. It proves NexGen knew Tesla had not agreed, which turns a contract slip into concealment.
Quoted the WhatsApp thread between Tesla and NexGen executives, including “I wish we had just sent the formal notification in February”, and used it to answer NexGen's claim that it “had two suppliers”.
Cited the thread only for what the amendment exhibit listed, and advised ending that channel. It never used the thread to show NexGen knew approval was missing. Its concealment case rests on other documents.
2Rejected the argument that Tesla approved the switch by signing a later amendmentCriticalG Pass · C Miss
Why it matters. NexGen says Tesla's signature on a later amendment meant it had accepted the change.
Rejected it three ways. The amendment contains no supplier term, consent after the event can't be “prior” consent, and Tesla didn't know what it was supposedly accepting.
Named NexGen's argument but didn't reject it. It listed possible answers, said one version of the record “supports NexGen's acceptance argument”, and concluded Tesla's conduct would reduce damages. The point was left open as a risk.
3Did not tell Tesla to keep paying the capacity fees unconditionallyCriticalG Pass · C Pass
Why it matters. Tesla pays large quarterly fees, and paying on as normal while the dispute runs would be costly.
Pay under protest or into escrow, and seek security before further advance payments.
Recommended suspending or escrowing the capacity fees and the remaining advance instalments.
4Spotted the amendment's built-in route to a backup cell supplierCriticalG Pass · C Pass
Why it matters. A practical lever that only exists in this particular contract.
Identified the amendment's exclusivity exception (one alternative supplier, up to 25% of volume, 180 days' notice) and advised serving notice early.
Recommended serving the 180-day alternative-supplier notice under the amendment as the practical exit.
5Read the force majeure definition both waysCriticalG Pass · C Pass
Why it matters. Fire is listed as a force majeure event, but the same definition excludes anything avoidable with reasonable care.
Quoted the definition in full and analysed both the fire and the reasonable-care exclusion.
Tied both points to the contract's own definition, quoted the reasonable-care exclusion, and noted the excuse covers only failures that result from the event.
6Tied the unconsented supplier switch to the contract's change-control clauseCriticalG Pass · C Pass
Why it matters. This is the pivot of the whole question.
Linked the switch from Livent to LRI, and the dropping of other sources, to the clause requiring Tesla's prior written consent.
Tied the unapproved switch to the same clause, cited NexGen's admission, and treated the switch, not the fire alone, as the pivot.
7Conceded first that a supplier fire is, on its face, force majeureCriticalG Pass · C Pass
Why it matters. Credibility. Don't dismiss the other side's best point without acknowledging it.
Conceded the fire is a listed event and beyond NexGen's control before turning to the exclusions.
Conceded the fire alone qualifies, calling it the weakest ground to contest.
8Causation. NexGen had a second source and chose to give it upCriticalG Pass · C Pass
Why it matters. This is what makes the reasonable-care exclusion bite.
Showed NexGen had other suppliers, gave them up, and so created its own exposure.
Framed the single-sourcing as deliberate and said the breach created the exposure, so NexGen shouldn't rely on an impediment it caused.
9Used NexGen's internal “handle the exit quietly” email as evidence of intentCriticalG Pass · C Miss
Why it matters. It shows deliberate concealment, which can lift the damages cap and defeat good-faith arguments.
Used the email as evidence the change was kept from Tesla, rejected the COO's innocent explanation, and built the good-faith argument on it.
Never quoted or analysed the instruction as evidence of intent. The June email appears only as a dating inconsistency, and the January email is cited only for its “delete after reading” line.
10Reserved all rights while staying open to talksMinorG Pass · C Pass
Why it matters. Avoids accepting the claim or terminating too early.
Rejected force majeure, reserved all rights, proposed a standstill, and warned against terminating now.
Formally rejected the claim, kept the supplier, preserved claims through notices and held termination in reserve.
11Reached the real commercial reason for the switchMinorG Pass · C Pass
Why it matters. NexGen recorded a quality reason, but the evidence points to money.
Identified the 3% rebate for exclusivity and the early-2023 email saying Livent's quality was acceptable, and flagged it as provisional until its source is proved.
Identified the hidden 3% rebate and the allegedly fabricated quality reports, citing the side letter, the January email and the whistleblower material.
12Flagged conflicting dates in the file and said which it relied onMinorG Pass · C Miss
Why it matters. Dates drive limitation periods and credibility, so silently picking one is risky.
Flagged four conflicts (Livent termination, first LRI shipment, when Tesla was told, date of the “quietly” email) and said which date it adopted and why.
Flagged other record problems (the “quietly” email dates, a board-minutes anomaly) but not conflicts over when the switch happened or when Tesla was told. It simply stated “by 20 March 2023”, never acknowledged NexGen's January claim, and gave no reason for its dates.
13Found the dual-sourcing rule outside the main contractMinorG Pass · C Pass
Why it matters. The rule sits in Tesla's quality documents, not the contract itself.
Found the dual-source and 90-day stock requirement in the Quality Standards Manual and used it as evidence of the standard of care, with a caution that incorporation isn't shown.
Looked past the contract to the same manual and weighed whether it binds NexGen.
14Stated which documents it relied on, in a way that can be checkedMinorG Pass · C Miss
Why it matters. A lawyer must be able to verify every statement.
Every issue carries a source line with clause, page and date references.
Gave an 18-item list whose names don't match the workspace files, and used material from documents not on it (the contract terminology guide, NexGen's pro forma projections, the board minutes).
15Did not claim full coverage while skipping material parts of the fileMinorG Pass · C Miss
Why it matters. Overstating thoroughness is dangerous for a reader who relies on it.
Flagged gaps (a missing exhibit, unproven provenance of two documents). The files it didn't read were unrelated to the question.
Delivered a confident, complete-looking analysis after 22 tool calls over 57 files without saying what it hadn't read. It never mentioned the Supplier Qualification Procedure, the Fischer deposition, the Livent termination letter or the Livent supply agreement.
How we ran the test
- The case file is simulated. The documents, events and dispute are fictional, built to reflect a realistic supply-contract fact pattern.
- Same 57 documents, same question and the same 15 checks (9 critical, 6 minor), with identical wording for both products.
- We compared one run of each product, so this is a single sample, not an average.
- The judge is Claude Opus 5.5. Cowork also runs on Claude, so the judge isn't a neutral third-party model. The checks were fixed before judging.
- Cowork ran on 5 October 2026 with its legal skills switched on. Genie ran its 13 October 2026 release build.
- This is one case. It doesn't prove how either product performs on every matter.
- Both products' answers rest on 2023 documents and unverified Swiss-law points, and need review by Swiss counsel before anyone relies on them.
Plain-English glossary
- Force majeure
- A clause excusing a party from its obligations when an extraordinary event outside its control prevents performance.
- Reasonable-care exclusion
- A carve-out. The excuse doesn't apply to events that could have been avoided with reasonable care and foresight.
- Causation
- Whether the failure to perform actually resulted from the event, rather than from the party's own choices.
- Acquiescence or implied approval
- The argument that staying silent or signing something later amounts to accepting a change.
- Capacity reservation fee
- Money Tesla pays in advance to keep NexGen's production capacity available.
- Escrow
- Money held by a neutral party until a condition is met.
- Critical and minor checks
- Critical checks are points whose omission would materially weaken the advice.
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