The question of nuclear inspections has become the latest flashpoint between the United States and Iran, exposing just how publicly and contentiously the two nations are negotiating their fragile path out of war. On Wednesday, the head of the United Nations nuclear agency declared that inspectors would visit Iran’s enrichment sites, only for an Iranian diplomat to flatly contradict him, insisting no such visit would happen until a final deal is reached.

A Negotiation Playing Out in the Open

The clashing statements echoed similar contradictions from the day before, part of a pattern that has defined the week since the two countries signed their interim agreement. Rather than hashing out differences quietly, leaders from both sides keep airing competing interpretations of what the deal actually means.

International Atomic Energy Agency chief Rafael Mariano Grossi openly acknowledged the “war of words” surrounding Iran’s nuclear program. But the dueling narratives extend well beyond inspections. They touch on Israel’s conflict with Iranian-backed Hezbollah in Lebanon and on how Tehran will be allowed to spend billions of dollars once its assets are unfrozen.

Through the signing of a memorandum of understanding, the U.S. and Iran agreed to a 60-day window to work out these details in private. Until then, both sides continue to negotiate in public, a risky dynamic that threatens the shaky regional ceasefire.

Grossi: “This Is Going to Happen”

Grossi offered the firmest statement yet from the agency at the center of verifying Iran’s nuclear stockpile. Speaking from the tsunami-damaged Fukushima Daiichi nuclear plant in Japan, he stressed that the memorandum signed by both presidents explicitly states that Iran’s nuclear activities and facilities will be supervised by the IAEA.

To carry out that supervision, he said, inspections are unavoidable. He framed the exact timing as important but not essential, suggesting it could happen within days or a couple of weeks, but expressing certainty that it would ultimately occur.

The deal also calls for Iran’s uranium to be “downblended” from highly enriched levels, a key step in reducing proliferation concerns.

Iran Pushes Back Hard

Tehran was quick to reject Grossi’s framing. Kazem Gharibabadi, an Iranian deputy foreign minister, took a direct swipe at the IAEA chief, noting pointedly that Iran did not meet with him while he was in Switzerland.

Gharibabadi insisted these matters would only be settled within the framework of a final agreement, and only after the other side takes concrete action to lift all sanctions and related measures. He warned that media hype would not advance what he characterized as a “stir up and take over” approach.

The Stakes Behind the Inspections

The dispute carries enormous weight. Since Israel launched a 12-day war on Iran in 2025, the IAEA has been blocked from visiting Iran’s enrichment sites. By some estimates, the Islamic Republic holds enough highly enriched uranium to potentially build as many as 10 nuclear weapons, should it decide to do so.

Iran maintains its program is entirely peaceful. Still, it remains the only country in the world to have enriched uranium to 60% purity without a weapons program, a fact that fuels international suspicion.

While the IAEA has been permitted to visit some other nuclear sites since the 2025 war, it says that without access to the enrichment facilities, it cannot verify the true status of Iran’s stockpile. Both Iran and the agency say Tehran hasn’t been enriching uranium recently, but nonproliferation experts worry the country may be quietly relocating its stockpile.

A Ceasefire Under Strain

The broader deal, agreed last week, requires Iran to dilute its enriched uranium and waives U.S.-backed sanctions on Iranian oil. Yet the uneasy truce has already been tested.

Iran said it closed the Strait of Hormuz again amid fighting between Israel and Hezbollah in Lebanon. That conflict flared further on Wednesday when an Israeli airstrike killed two people in southern Lebanon, the first such strike since the latest ceasefire took effect on Saturday. The Israeli military offered no immediate comment.

Israel showed little sign of backing down. Its defense minister said the U.S. had not demanded a withdrawal from Lebanon, and Prime Minister Benjamin Netanyahu declared that Israel would maintain its security zone in southern Lebanon for as long as he leads the country. Meanwhile, Lebanese and Israeli officials are meeting in Washington this week, with Lebanon hoping to negotiate a plan for Israeli withdrawal.

The Fight Over Frozen Funds

Money is another source of friction. The interim deal pledges to unfreeze billions in Iranian assets, but the two sides disagree sharply over how that money should be used.

President Trump wants the funds directed toward purchasing American-grown crops. Iranian officials counter that they alone should decide how the money is spent.

U.S. Treasury Secretary Scott Bessent said his department would station personnel in Qatar to oversee the funds. In a CNBC interview, he predicted Iran would spend a very large share of its released money on American food and medicine, describing it as recycling the money back into U.S. products.

Diplomacy Continues on Multiple Fronts

Amid the tensions, diplomatic efforts pressed forward. Technical-level talks between the U.S. and Iran are expected to resume early next week in Switzerland, with Pakistan, a key mediator, helping facilitate.

Secretary of State Marco Rubio, meanwhile, embarked on a three-nation Persian Gulf tour, beginning in Abu Dhabi with a meeting alongside Emirati President Mohammed bin Zayed Al Nahyan. Speaking in Kuwait, where the U.S. announced a limited reopening of its embassy closed during the height of the war, Rubio pledged that Washington would do nothing to undermine the security of its allies.

Before heading to Bahrain, Rubio described ongoing negotiations involving the creation of hundreds of specific zones where Lebanon’s military could secure its own territory, cautioning that such progress would not happen overnight.

A Deal Held Together by Threads

A week into the agreement, the US and Iran remain far apart on fundamental questions, from when inspectors can enter enrichment sites to how unfrozen billions will be spent. With public sparring substituting for quiet diplomacy and violence still flaring in Lebanon, the ceasefire remains precarious. Whether the next round of talks in Switzerland can translate the memorandum’s promises into concrete action may determine if this fragile peace holds or unravels.