openai

GPT-5.6 Terra

5/5 at $0.39 — GPT-5.5's scorecard at a third of the bill.

5/5

benchmarks passed

$0.392

spent in total

tool calls

What it is.

OpenAI's GPT-5.6 Terra — the balanced middle tier of the July 2026 GPT-5.6 preview, priced at half of GPT-5.5 ($2.50/$15 per 1M tokens). OpenAI pitches it as 5.5-competitive for everyday work; our matrix agrees.

What it does well.

Perfect score with the tightest tool budget of the run: 2-4 calls per benchmark, 13 total.
Cheapest Sales pass in the matrix: two tool calls and $0.023 on the Crunchbase brief, taking the crown from Gemini 3 Flash.
Fastest cell of the whole run — the Sales brief completed in 9 seconds.

Where to be careful.

The CX benchmark ate $0.20 — over half its matrix total. Open-ended review mining makes it think; budget for that on ambiguous tasks.
Preview pricing. The $0.39 total assumes the half-of-5.5 preview rate holds at GA.
Same short-horizon caveats as the rest of the matrix: 2-9 tool-call tasks, no adversarial inputs, no multi-hour chains.

Results by agent

Five real jobs.

SalesSales Research Analyst

Get financials on a company

Passed

Find Hightouch on Crunchbase and return their total funding, last round type, and a one-line description.

Two tool calls, $0.023, 9 seconds end to end. The cheapest and fastest Sales pass we have recorded.

MarketingMarketing Research Analyst

Find what customers are recommending on Reddit

Passed

Read a real r/sales thread on enrichment tools and rank the top 5 by how many people recommended them.

Three tool calls, $0.089. One search, one thread read, one enrichment pass — ranked all five tools cleanly.

CXCustomer Insights Analyst

Find what customers are complaining about

Passed

Pull Google Shopping reviews for AirPods Pro 2 (USB-C) and return the top 3 recurring complaints, with verbatim quotes.

Four tool calls, $0.20. Where Sol over-delivered, Terra returned exactly 3 complaints with verbatim quotes.

CodingSenior Engineer Assistant

Read API docs and write working code

Passed

Read Stripe's official docs and write a real, working webhook-verification function in TypeScript.

Two tool calls, $0.05. Docs read, HMAC verifier written, schema respected.

Web ScrapingSales Outreach Specialist

Scrape a competitor's pricing page

Passed

Scrape Apollo.io's pricing page and return every tier (Free, Basic, Professional, Organization) with name, price, and top 3 features.

Two tool calls, $0.027. All four tiers, three features each.

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