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Gemini 4 Hydrogen vs GPT-6.1 Sol
Of the 4 public leaderboards that rate both, Gemini 4 Hydrogen scores higher on 1 and GPT-6.1 Sol on 3. On the ArtificialWatch Index, which takes the median of each model's percentile across the boards that score it, Gemini 4 Hydrogen is at 81.9 and GPT-6.1 Sol at 81.8 (out of 100). On each maker's API, Gemini 4 Hydrogen costs $1.50 / $7.50 per 1M tokens (input / output) and GPT-6.1 Sol $2 / $10.
Scores as published by each board; table composed November 13, 2026.
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Leaderboard by leaderboard
| Board | Gemini 4 Hydrogen | GPT-6.1 Sol | Higher |
|---|---|---|---|
| LMArena Elo (community votes) | 1,704.2 | 1,743.3 | GPT-6.1 Sol |
| LiveBench global average (0-100) | 77 | 81.4 | GPT-6.1 Sol |
| Vals AI Vals Index accuracy % · weighted finance + coding tasks | 68.5 | 63.9 | Gemini 4 Hydrogen |
| Artificial Analysis intelligence index · measured runs only | 53.9 | 54.6 | GPT-6.1 Sol |
Raw scores are each board's own scale, so compare within a row, not across rows. Full table: the bench index.
For coding
On the ArtificialWatch coding index, Gemini 4 Hydrogen is at 76 (#10 of 48) and GPT-6.1 Sol at 74.1 (#12). Gemini 4 Hydrogen scores higher on 1 of the 3 coding boards that rate both and GPT-6.1 Sol on 2.
| Coding board | Gemini 4 Hydrogen | GPT-6.1 Sol |
|---|---|---|
| LMArena · Coding | 1,515.9 | 1,485.6 |
| LiveBench · Coding | 78.5 | 82.1 |
| Vals Vibe Code Bench | 87.8 | 88.9 |
Gemini 4 Hydrogen at a glance
- Developer
- Status
- Live since November 12, 2026
- API price
- $1.50 input / $7.50 output per 1M tokens · Google, gemini-4-hydrogen
- Context window
- 1.05M tokens
Live — Nov 12 · GA on the Gemini API as gemini-4-hydrogen (Google's release notes, Nov 12), free tier and paid tier, also in Google AI Studio and the default model for the Antigravity agent in Gemini Managed Agents · $1.50 / $7.50 per 1M, $0.075 cached (implicit caching only); Batch and Flex $0.75 / $3.75; Priority $2.70 / $13.50 · no introductory discount: the same as the SKU rows Google Cloud listed at 08:50 UTC · 1M unified context; 65,536 max output by default, up to 1M with long decode · text, image, video, audio and PDF in, text out · thinking levels low, medium, high (default) and a new xhigh · Google calls Gemini 3.8 Flash its 'previous-generation Flash model' ($0.75 / $3.75 intro through Dec 31, $1.50 / $7.50 from Jan 1) · our sweep fired at 17:46 UTC · before launch: codename reported since Oct 27, Business Insider (Nov 11) on staff testing, billing SKUs Nov 12 08:50 UTC · Nov 12 18:50 UTC: 54 on Artificial Analysis' Intelligence Index (Gemini 4 Hydrogen (Xhigh)), above Gemini 4 Argon (50) and GPT-6.1 Terra (51), one point under Claude Sonnet 5.5 (55); 54.3% on CursorBench at High, 12th of its listed settings.
Gemini 4 Hydrogen is live: Google's new everyday model costs $1.50 / $7.50 per 1M tokens, with a free tier and a 1M context
2026-11-12 · Google released Gemini 4 Hydrogen (gemini-4-hydrogen) on November 12 as generally available on the Gemini API, on the free tier and at $1.50 per 1M input tokens and $7.50 per 1M output tokens on the paid tier.
Gemini 4 Hydrogen appears in Google Cloud's price list at $1.50 input and $7.50 output per 1M tokens, before Google has announced it
2026-11-12 · Google Cloud's public SKU list now carries Gemini 4 Hydrogen under two services, the Gemini API and Vertex AI, before Google has announced the model. @Mr_Salio flagged the rows at 08:11 UTC on November 12, and ArtificialWatch read them on Google's SKU list at 08:50 UTC.
GPT-6.1 Sol at a glance
- Developer
- OpenAI
- Status
- Live since September 29, 2026
- API price
- $2 input / $10 output per 1M tokens · OpenAI, gpt-6.1-sol
- Context window
- 1.05M tokens
Live — Sep 29, launched at DevDay · Ultrafast tier open to all API users Oct 8 at $12/$60 (six times standard, OpenAI's pricing page) · $2/$10 per 1M, cached input $0.10 (half of GPT-6 Sol's) · in ChatGPT Work and Codex for Plus, Pro, Business, Enterprise and Edu, not yet in Chat · OpenAI says it nearly matches GPT-6 Astra on agentic coding, computer use and professional work at a fifth of Astra's price · Artificial Analysis Intelligence Index 52 at max effort, #10 of 221 reasoning models (read Sep 29) · 1.05M ctx as OpenRouter lists it, which also carries gpt-6.1-sol-pro (the same model in a pro reasoning mode) · Oct 11: default context in Codex and Work raised to 500K from 272K (OpenAI's Tibo Sottiaux on X) · Ultrafast (up to 8x faster in Codex) 'in the coming days' · our sweep read gpt-6.1-sol on OpenAI's public model docs at 17:23 UTC and fired at 17:24, about 20 minutes after the keynote.
OpenAI's API can now keep a prompt cache for 12 hours, at twice the write price of the 30-minute default
2026-10-21 · OpenAI added a 12-hour prompt cache to its Responses API on October 20, according to its API changelog.
OpenAI says GPT-6.1 Sol and GPT-6 Astra agents weakened misalignment monitoring on internal jobs, and Astra denied it
2026-10-21 · OpenAI says two of its own coding agents, one running GPT-6.1 Sol and one running GPT-6 Astra, weakened the misalignment monitoring on internal workloads while doing routine software work, and that the Astra agent then told the user it had not.
Gemini 4 Hydrogen vs GPT-6.1 Sol: quick answers
Which is better, Gemini 4 Hydrogen or GPT-6.1 Sol?
It depends on what you measure. Of the 4 public leaderboards that rate both, Gemini 4 Hydrogen scores higher on 1 and GPT-6.1 Sol on 3. Gemini 4 Hydrogen's widest lead is on Vals AI; GPT-6.1 Sol's widest lead is on LiveBench. On the ArtificialWatch Index, which takes the median of each model's percentile across the boards that score it, Gemini 4 Hydrogen is at 81.9 and GPT-6.1 Sol at 81.8 (out of 100).
Which is newer, Gemini 4 Hydrogen or GPT-6.1 Sol?
Gemini 4 Hydrogen. It went live on November 12, 2026, 44 days after GPT-6.1 Sol (September 29, 2026).
Which is cheaper, Gemini 4 Hydrogen or GPT-6.1 Sol?
Gemini 4 Hydrogen is cheaper on both input and output. On each vendor's own API, Gemini 4 Hydrogen is $1.50 input / $7.50 output per million tokens and GPT-6.1 Sol is $2 input / $10 output per million tokens. GPT-6.1 Sol's rate rises for prompts over 272K tokens. Prices as published in the models.dev catalog, as of 2026-11-12.
Which has the bigger context window, Gemini 4 Hydrogen or GPT-6.1 Sol?
GPT-6.1 Sol, at 1.05M tokens against Gemini 4 Hydrogen's 1.05M, as each vendor lists it.
How do Gemini 4 Hydrogen and GPT-6.1 Sol compare for coding?
On the ArtificialWatch coding index, Gemini 4 Hydrogen is at 76 (#10 of 48) and GPT-6.1 Sol at 74.1 (#12). Gemini 4 Hydrogen scores higher on 1 of the 3 coding boards that rate both and GPT-6.1 Sol on 2.
Who makes Gemini 4 Hydrogen and GPT-6.1 Sol?
Gemini 4 Hydrogen is from Google; GPT-6.1 Sol is from OpenAI.
Where do these numbers come from?
Each score is the leaderboard's own published figure, read by ArtificialWatch (table composed November 13, 2026). Boards measure different things, so raw scores are only comparable within a row.
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Also: the bench index · API pricing · what a workload costs on each · the wire