Claude Opus 4.7 Hits 1505 Arena ELO Tied With Gemini 3.1 Pro — Three Days After Joining the Leaderboard
Claude Opus 4.7 was added to the Chatbot Arena leaderboard on April 17. By April 18 — one day after being listed — it had already accumulated enough votes to settle at 1505 ELO in the Thinking configuration, tied with Gemini 3.1 Pro Preview for the highest score on the general leaderboard.
Claude Opus 4.7 standard (without extended thinking) landed at 1503, tied with Claude Opus 4.6 Thinking. The full top of the leaderboard as of April 18:
| Model | Arena ELO |
|---|---|
| Claude Opus 4.7 Thinking | 1505 |
| Gemini 3.1 Pro Preview | 1505 |
| Claude Opus 4.7 | 1503 |
| Claude Opus 4.6 Thinking | 1503 |
| Grok 4.20 | 1496 |
| GPT-5.4 High | 1495 |
| Gemini 3 Pro | 1492 |
| Claude Opus 4.6 | 1490 |
Coding Arena: Claude Dominates
The Coding Arena paints a sharper picture. Claude Opus 4.7 Thinking leads at 1565 Coding ELO, followed by Claude Opus 4.6 Thinking at 1545, Claude Opus 4.7 standard at 1554, and GPT-5.4 High at 1538. Gemini 3.1 Pro sits at 1531 in the Coding Arena.
Claude holds four of the top five coding slots. GPT-5.4 High is the only non-Anthropic model in the top tier.
Context: A Fast Climb
The speed of the settlement is notable. Opus 4.6 climbed from 1398 ELO in February to 1504 by early April — a two-month trajectory driven by sustained voting. Opus 4.7, benefiting from its predecessor’s reputation and significant launch coverage, appears to have entered with higher initial vote velocity. One day in, it matched the ceiling its predecessor took two months to reach.
That said, single-day ELO readings carry higher variance. The 1505 figure will settle further over coming weeks as vote volume increases. Gemini 3.1 Pro’s position is also evolving — the model entered earlier and has more stabilised ratings.
Pricing Gap
Both models at the top of the general leaderboard carry very different price tags. Claude Opus 4.7 runs at $5 per million input tokens and $25 per million output tokens. Gemini 3.1 Pro Preview is priced at $2 input / $12 output. At equal ELO, Gemini retains a 60% input cost advantage over Claude.
That differential is consistent with the intelligence-to-cost analysis published earlier this month: Gemini 3.1 Pro was described as matching GPT-5.4 on intelligence at 20% lower cost. Against Claude Opus 4.7, the cost gap is larger still.
Key Numbers
- Claude Opus 4.7 Thinking Arena ELO: 1505 (Coding: 1565)
- Claude Opus 4.7 standard Arena ELO: 1503 (Coding: 1554)
- Gemini 3.1 Pro Preview Arena ELO: 1505 (Coding: 1531)
- GPT-5.4 High Arena ELO: 1495 (Coding: 1538)
- Claude Opus 4.7 pricing: $5/$25 per million tokens
- Gemini 3.1 Pro pricing: $2/$12 per million tokens