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model	score	output
claude-opus-5	100%	Under the Treaty of Roskilde, signed on 26 February 1658 at the end of Charles X Gustav's march across the frozen Danish straits, Denmark–Norway ceded the following to Sweden: From Denmark proper: - Scania (Skåne) – the rich southernmost province - Blekinge - Halland – which Sweden had already held on a 30-year lease since the Treaty of Brömsebro (1645); Roskilde made the cession permanent - The island of Bornholm in the Baltic - The island of Ven (Hven) in the Øresund, near Landskrona From Norway: - Bohuslän (the district of Bahus/Båhus len), which gave Sweden a permanent outlet on the Skagerrak - Trøndelag (Trondheim county/Trondhjems len), which cut Norway in two and linked Sweden to the Atlantic Denmark also had to renounce its anti-Swedish alliances, bar hostile foreign fleets from the Baltic, and supply troops for Swedish service. Aftermath: Charles X Gustav soon reopened the war, hoping to eliminate Denmark altogether, but the failed assault on Copenhagen and Dutch–Brandenburg–Austrian–Polish intervention reversed part of his gains. By the Treaty of Copenhagen (1660), concluded after his death, Sweden returned Bornholm and Trøndelag, while retaining Scania, Blekinge, Halland and Bohuslän — establishing essentially the modern Swedish–Danish–Norwegian border.
openai/gpt-5.6-terra-pro	0%	Under the Treaty of Roskilde (1658), Denmark–Norway ceded the following to the Swedish Empire under Charles X Gustav: - Skåne (Scania) - Blekinge - Halland — previously held by Sweden temporarily after 1645, now ceded permanently - Bohuslän — a Norwegian province - Trøndelag (the Trondheim region) — a Norwegian territory - Bornholm — the Danish Baltic island Bornholm and Trøndelag were later returned to Denmark–Norway under the Treaty of Copenhagen in 1660, while Skåne, Blekinge, Halland, and Bohuslän remained Swedish.
mistral-large-2512	0%	Under the Treaty of Roskilde (1658), the Swedish Empire, under King Charles X Gustav, acquired several territories from Denmark-Norway as a result of Sweden's victory in the Second Northern War (1655–1660). The key provinces and territories ceded to Sweden were: ### From Denmark (proper): 1. Skåne (Scania) – The southernmost province of modern Sweden, including the cities of Malmö, Lund, and Helsingborg. 2. Blekinge – A coastal province in southeastern Sweden, including Karlskrona (later a major naval base). 3. Halland – A western coastal province, including Halmstad. 4. Bornholm – A Danish island in the Baltic Sea (though Sweden later lost it in 1660 under the Treaty of Copenhagen). 5. Trøndelag (Norwegian territory) – The central region of Norway, including Trondheim (Nidaros), though Sweden lost this in 1660 as well. ### From Norway (then under Danish rule): 6. Båhuslen (Bohuslän) – A western coastal region, including Uddevalla and the fortress of Båhus. 7. Jämtland and Härjedalen – Inland Norwegian provinces bordering Sweden (still part of Sweden today). ### Additional Terms: - Denmark also ceded the island of Hven (Ven) in the Øresund strait. - Sweden gained control of the Øresund (Sound) tolls, a major economic advantage. - Denmark had to recognize Sweden’s control over the Baltic Sea and limit its navy. ### Later Adjustments (Treaty of Copenhagen, 1660): After Sweden’s defeat in the Dano-Swedish War (1658–1660), the Treaty of Copenhagen (1660) forced Sweden to return: - Bornholm (to Denmark) - Trøndelag (to Norway) ### Permanent Swedish Gains (Still Part of Sweden Today): - Skåne, Blekinge, Halland, Båhuslen, Jämtland, Härjedalen These acquisitions significantly expanded Sweden’s territory, particularly in the south, making it a dominant Baltic power. However, the loss of Bornholm and Trøndelag in 1660 marked a partial reversal of Sweden’s gains.

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Under the Treaty of Roskilde, signed on 26 February 1658 at the end of Charles X Gustav's march across the frozen Danish straits, Denmark–Norway ceded the following to Sweden: **From Denmark proper:** - **Scania (Skåne)** – the rich southernmost province - **Blekinge** - **Halland** – which Sweden had already held on a 30-year lease since the Treaty of Brömsebro (1645); Roskilde made the cession permanent - **The island of Bornholm** in the Baltic - **The island of Ven (Hven)** in the Øresund, near Landskrona **From Norway:** - **Bohuslän** (the district of Bahus/Båhus len), which gave Sweden a permanent outlet on the Skagerrak - **Trøndelag** (Trondheim county/Trondhjems len), which cut Norway in two and linked Sweden to the Atlantic Denmark also had to renounce its anti-Swedish alliances, bar hostile foreign fleets from the Baltic, and supply troops for Swedish service. **Aftermath:** Charles X Gustav soon reopened the war, hoping to eliminate Denmark altogether, but the failed assault on Copenhagen and Dutch–Brandenburg–Austrian–Polish intervention reversed part of his gains. By the **Treaty of Copenhagen (1660)**, concluded after his death, Sweden returned **Bornholm** and **Trøndelag**, while retaining Scania, Blekinge, Halland and Bohuslän — establishing essentially the modern Swedish–Danish–Norwegian border.

openai/gpt-5.6-terra-pro

Under the Treaty of Roskilde (1658), Denmark–Norway ceded the following to the Swedish Empire under Charles X Gustav: - **Skåne (Scania)** - **Blekinge** - **Halland** — previously held by Sweden temporarily after 1645, now ceded permanently - **Bohuslän** — a Norwegian province - **Trøndelag (the Trondheim region)** — a Norwegian territory - **Bornholm** — the Danish Baltic island Bornholm and Trøndelag were later returned to Denmark–Norway under the Treaty of Copenhagen in 1660, while Skåne, Blekinge, Halland, and Bohuslän remained Swedish.

mistral-large-2512

Under the **Treaty of Roskilde (1658)**, the **Swedish Empire**, under **King Charles X Gustav**, acquired several territories from **Denmark-Norway** as a result of Sweden's victory in the **Second Northern War (1655–1660)**. The key provinces and territories ceded to Sweden were: ### **From Denmark (proper):** 1. **Skåne (Scania)** – The southernmost province of modern Sweden, including the cities of **Malmö, Lund, and Helsingborg**. 2. **Blekinge** – A coastal province in southeastern Sweden, including **Karlskrona** (later a major naval base). 3. **Halland** – A western coastal province, including **Halmstad**. 4. **Bornholm** – A Danish island in the Baltic Sea (though Sweden later lost it in **1660** under the **Treaty of Copenhagen**). 5. **Trøndelag (Norwegian territory)** – The central region of Norway, including **Trondheim (Nidaros)**, though Sweden lost this in **1660** as well. ### **From Norway (then under Danish rule):** 6. **Båhuslen (Bohuslän)** – A western coastal region, including **Uddevalla** and the fortress of **Båhus**. 7. **Jämtland and Härjedalen** – Inland Norwegian provinces bordering Sweden (still part of Sweden today). ### **Additional Terms:** - Denmark also ceded the island of **Hven (Ven)** in the Øresund strait. - Sweden gained control of the **Øresund (Sound) tolls**, a major economic advantage. - Denmark had to recognize Sweden’s control over the **Baltic Sea** and limit its navy. ### **Later Adjustments (Treaty of Copenhagen, 1660):** After Sweden’s defeat in the **Dano-Swedish War (1658–1660)**, the **Treaty of Copenhagen (1660)** forced Sweden to return: - **Bornholm** (to Denmark) - **Trøndelag** (to Norway) ### **Permanent Swedish Gains (Still Part of Sweden Today):** - **Skåne, Blekinge, Halland, Båhuslen, Jämtland, Härjedalen** These acquisitions significantly expanded Sweden’s territory, particularly in the south, making it a dominant Baltic power. However, the loss of **Bornholm and Trøndelag** in 1660 marked a partial reversal of Sweden’s gains.