Best AI Model 2026 is the consolidated year-end leaderboard on which lab holds the top-ranked large language model on December 31, 2026. Anthropic's Claude is the runaway favorite, with OpenAI's ChatGPT and Google's Gemini the nearest challengers and xAI's Grok and Meta's LLaMA further back. The board spans 13 named contenders across Kalshi and Polymarket and settles against the LM Arena leaderboard. The live board above ranks the current cross-platform prices for every model in the race.
Best AI Model 2026 is the year-end market on which lab holds the top-ranked large language model when the clock runs out on December 31, 2026. It is a single consolidated board covering 13 named contenders across Kalshi and Polymarket, from the frontier labs down to the Chinese open-weight challengers. Anthropic's Claude is the runaway favorite, OpenAI's ChatGPT and Google's Gemini are the nearest challengers, and everyone else is trading for a comeback. The live board above ranks the current cross-platform prices.
Anthropic's Claude is the chalk on the Best AI Model 2026 board, and it is not close. The market prices Claude as the clear favorite on both Kalshi and Polymarket, with the two books agreeing almost exactly on where the line sits. That agreement matters. When two independent venues converge on the same number for the same question, the read is a market with real conviction rather than one thin book setting the tone.
Claude's position rests on holding the top of the LM Arena text leaderboard, the benchmark this market settles against. Anthropic has spent 2026 defending that spot, and the monthly version of this market has already all but decided in Claude's favor for July. The year-end contract is the harder question. Five more months of releases from OpenAI, Google and xAI stand between now and settlement, and the leaderboard has changed hands before.
OpenAI's ChatGPT and Google's Gemini are the co-second favorites on the Best AI Model 2026 board, priced within a hair of each other and well clear of the rest of the field. Each has the resources and the release cadence to top the LM Arena leaderboard in any given month, which is why the market keeps them alive as the primary threats to Claude.
The two challengers trade differently under the hood. ChatGPT carries a two-book line, quoted on both Kalshi and Polymarket, so its price reflects agreement across venues. Gemini's line shows on Kalshi only, because Google's Polymarket contract is closed. That is a coverage gap in where the model is listed, not a pricing edge to trade. On the question that matters, both sit in the same tier: credible enough to win, long enough that the market is pricing an upset rather than a coin flip.
Behind the top three, xAI's Grok and Meta's LLaMA are the next names on the Best AI Model 2026 board, both trading as clear underdogs. Grok carries a two-book line across Kalshi and Polymarket and sits ahead of LLaMA, which also trades on both venues. Neither is priced as a real threat to top the LM Arena leaderboard by year end, but both are live enough that a standout frontier release would move them.
The rest of the field is the longshot tier: Alibaba's Qwen, DeepSeek, Mistral, Microsoft, ByteDance, Baidu's Ernie, Moonshot AI and Meituan. These are the deep-value tickets, priced at or near the floor. For any of them to resolve the market, the leaderboard would need a shakeup that no frontier lab has produced in 2026. They are on the board because the market lists every contender, not because the price says they are arriving.
The Best AI Model 2026 market resolves on December 31, 2026, to the company whose large language model holds the top position on the LM Arena leaderboard, the successor to Chatbot Arena. Kalshi's KXLLM1 year-end market settles on the LM Arena text ranking with Style Controls removed, ordered by Rank (UB). If two models tie, the higher Arena Score wins, then the model with more votes, then the earlier release date. Each company contract pays $1 per share if that company owns the top-ranked model on the resolution date, and $0 otherwise. The metric is the public leaderboard standing on the final day of the year, not a cumulative average across 2026.
Several forces will decide where the Best AI Model 2026 market settles:
The Best AI Model 2026 board is the year-end anchor, but it is not the only AI race on the board. The monthly Best AI Model end-of-July 2026 market is effectively decided, with Claude sitting far ahead for July while the year-end version stays live through December. For the narrower question of who writes the best code rather than who tops the general leaderboard, the best coding model at the end of 2026 market tells its own story, with Anthropic again out front. Browse the full slate of tech prediction markets for AI, chip and platform bets resolving through 2026 and beyond.
Resolves December 31, 2026 to the company whose large language model holds the top position on the LM Arena leaderboard, the successor to LMArena and Chatbot Arena. Kalshi's KXLLM1 year-end market settles on the LM Arena text ranking with Style Controls removed, ordered by Rank (UB). Ties break to the model with the higher Arena Score, then the most votes, then the earlier release date. Each company contract pays $1 per share if that company holds the top-ranked model on the resolution date; all other contracts resolve to $0. The source of truth is the public leaderboard standing on the final day of 2026, not a cumulative average across the year.
As of July 15, 2026, Claude is the favorite near 67c on both Kalshi and Polymarket, with ChatGPT and Gemini around 13c each and Grok near 7c. The live board above shows the current cross-platform prices for all 13 contenders.
It resolves on December 31, 2026, based on which company holds the top-ranked large language model on the LM Arena leaderboard on that date.
The market trades on Kalshi under the KXLLM1 year-end series and on Polymarket as the end-of-2026 best AI model event, so most top contenders carry a two-book cross-platform price.
Anthropic's Claude is the runaway favorite. As of July 15, 2026, it trades near 67c on both Kalshi and Polymarket, more than four times the price of the next challengers, ChatGPT and Gemini.
Watch for a late-2026 frontier release from OpenAI or Google strong enough to pass Claude on the LM Arena text leaderboard, since the December 31, 2026 snapshot rewards whoever sits on top on the final day.