# R1 | anthropic/claude-opus-5 | run 1

## Prompt

In what year was the Eiffel Tower completed, and how tall is it including antennas? Cite your sources.

## Response

The Eiffel Tower was completed in 1889 and today stands 330 metres (1,083 feet) tall including its antennas.

## Completion

The tower was designed by engineer Gustave Eiffel and built between 1887 and 1889 for the 1889 World's Fair, with its inauguration held on March 31, 1889 [Courthouse News](https://www.courthousenews.com/the-eiffel-tower-grows-even-higher-thanks-to-new-antenna/). The iron structure reached 300 metres (984 feet), making it the tallest man-made structure on Earth for 41 years until the Chrysler Building overtook it in 1930 [Eiffel Tower Dimensions](https://theeiffeltower.net/eiffel-tower-height-and-dimensions/).

## Current Height

On 15 March 2022, the Eiffel Tower grew by 6 metres thanks to the installation of a digital antenna, reaching 330 metres in height [Tour Eiffel Official](https://shop.toureiffel.paris/en/26-330-meters). The antenna was installed by TDF in preparation for DAB+ digital radio broadcasting, attached above the existing antennas at 324 metres [Tower Grows to 330m](https://www.toureiffel.paris/en/news/events/eiffel-tower-grows-330-meters-tall).

| Milestone | Height |
|---|---|
| 1889 iron structure | 300 m (984 ft) |
| 1889 with inauguration flagpole | ~312 m (1,024 ft) |
| 1957 TV equipment | 320.75 m (1,052 ft) |
| 2000 UHF antenna | 324 m (1,063 ft) |
| 2022 DAB+ antenna (current) | 330 m (1,083 ft) |

Official records note the tower reached 1,052 feet in 1957 with new 819-line transmission equipment, then 1,063 feet in 2000 with a new UHF antenna for digital terrestrial television [Story of the Tower's Height](https://www.toureiffel.paris/en/news/history-and-culture/300-330-meters-story-towers-height).

**Note on discrepancies:** Older references still cite 324 m, which reflects the pre-2022 configuration. Britannica describes the tower as standing 300 metres high on a 5-metre base, with the TV antenna giving a total elevation of 330 metres [Britannica](https://www.britannica.com/topic/Eiffel-Tower-Paris-France).

Would you like details on the highest point visitors can actually access?
