Models · SpaceXAI (formerly xAI) · Out sinceReleased 30 Apr 2026
Grok 4.3
Grok 4.3 is made by SpaceXAI (formerly xAI). We don't have enough test results yet to rank it. It's mid-priced to use.
Release date from OpenRouter listing (no x.ai news post found). Default effort = low. No vendor benchmarks found.
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- Mid-priced$1.25 / $2.50
- $1.56
- 1M
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- 3 (3 independent3 indep.)
- 30 Apr 2026
- SpaceXAI (formerly xAI)
- text, image
Scores are out of 100 for each area, compared with every model we track; “#” is its rank. Context is how much text it can read at once (1M is roughly 700,000 words). Blended price mixes the cost of what you send and what it writes back.
OpenRouter is a service that gives access to many AI models in one place. This model is listed there as x-ai/grok-4.3.
Route it as x-ai/grok-4.3 at $1.25 in / $2.50 out per 1M tokens, 1M context. Listed since 30 Apr 2026.
include_reasoninglogprobsmax_tokensreasoningreasoning_effortresponse_formatseedstructured_outputstemperaturetool_choicetoolstop_logprobstop_p
Every test result
Every result
All the numbers,with where they came from.
Every result we've found for this model, with who measured it and a link to where we read it.
All raw rows (vendor and independent kept separate), with setting label, source, date, harness and notes.
| NotesNotes | ||||||
|---|---|---|---|---|---|---|
| GPQA Diamond | 91.4% | Default | Independent testIndependentVals.ai ↗ | 1 Sep 2026 | — | ±1.406 stderr; $0.025/test |
| LLM Creative Story-Writing Benchmark (Lech Mazur) | -4.2 | DefaultGrok 4.3 | Independent testIndependentLech Mazur (LLM Creative Story-Writing Benchmark) ↗ | 28 Sep 2026 | — | rank 55/56; Thurstone comparison score (centered at 0); est. win chance 4%; 95% bootstrap -4.428 to -4.058 |
| Vals CorpFin v2 | 68.5% | Defaultvals id grok/grok-4.3 | Independent testIndependentVals.ai ↗ | 12 Aug 2026 | — | vals id grok/grok-4.3; rank 8/134; ±0.915 stderr; $0.134161/test |