Grok 4.3 Alternatives
Decision and evidence surface verified 2026-08-14.
What is the best alternative to Grok 4.3?
The closest alternative to Grok 4.3 (xAI, $1.56/M blended) is Grok 4.6, from xAI, a drop-in migration priced +92% relative to Grok 4.3 at blended (3:1) rates. The tradeoff: you'd give up context drops from 1,000,000 to 500,000 tokens.
The closest match to Grok 4.3 (xAI, $1.56/M) is Grok 4.6 — a drop-in migration at +92% price. You'd give up: context drops from 1,000,000 to 500,000 tokens.
Ranked — top 8 alternatives
| # | Model | Provider | Effort | Blended $/M (Δ%) | tok/s (Δ%) | Context | Parity | Closeness |
|---|---|---|---|---|---|---|---|---|
| 1 | Grok 4.6 | xAI | drop-in | $3.00 (+92%) | — | -500K | 80% | 88 |
| 2 | Grok 4.5 | xAI | drop-in | $3.00 (+92%) | — | -500K | 80% | 88 |
| 3 | Grok-4.20 Reasoning | xAI | drop-in | $3.00 (+92%) | -46.9% | 0K | 100% | 88 |
| 4 | GLM-5.2 | Z.ai | config | $2.15 (+37.6%) | — | 0K | 80% | 84 |
| 5 | Gemini 3.7 Flash | code-change | $1.50 (-4%) | — | +49K | 100% | 82 | |
| 6 | Muse Spark 1.3 Contributor | Meta | config | $0.13 (-92%) | — | +49K | 60% | 77 |
| 7 | Muse Spark 1.3 | Meta | config | $2.00 (+28%) | — | +49K | 60% | 75 |
| 8 | Gemini 3.5 Flash Lite | code-change | $0.85 (-45.6%) | +65.3% | 0K | 100% | 75 |
Top 3, in detail
Same provider — change the model string, nothing else.
You lose: Context drops from 1,000,000 to 500,000 tokens.
base_url: https://api.x.ai/v1 auth: Bearer API key
base_url: https://api.x.ai/v1 auth: Bearer API key sdk: openai model: "grok-4.6"
Same provider — change the model string, nothing else.
You lose: Context drops from 1,000,000 to 500,000 tokens.
base_url: https://api.x.ai/v1 auth: Bearer API key
base_url: https://api.x.ai/v1 auth: Bearer API key sdk: openai model: "grok-4.5"
Same provider — change the model string, nothing else.
base_url: https://api.x.ai/v1 auth: Bearer API key
base_url: https://api.x.ai/v1 auth: Bearer API key sdk: openai model: "grok-4.20-0309-reasoning"
Or don't migrate at all
One base URL, one key, change the model string — every alternative above is already callable through All AI Ask.
curl https://allaiask.com/api/v1/chat \
-H "Authorization: Bearer $ALLAIASK_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model": "grok-4.6", "messages": [{"role": "user", "content": "Hello"}]}'Related
FAQ
Batch 45 evidence surface · verified 2026-08-14 · frozen route allowlist: /alternatives/grok-4-3
Grok 4.3 context frontier, decision ledger, and matched replay
Batch 45 · M1: 1M-context migration frontier
Formula / rule: admission = must-keep evidence retained ∧ headroom ≥ 0; fit does not imply quality.
Dated provenance: Frozen Batch 45 grok-4-3 fixture; 120K, 480K, 900K, and 1.05M inputs with 8K/64K output reserves; authoritative evidence and surface verification date 2026-08-14.
First-party citation: xAI API documentation
| Field ID / fixture | Inputs | Observation / calculation | Decision boundary | State |
|---|---|---|---|---|
batch45-grok-4-3-m1-r1120K + 480K inputs | candidate envelope; 8K/64K reserve; retained segments; citation coverage | Both fit single pass; headroom is 872K with 8K reserve for 120K and 456K for 480K. | Headroom does not rank candidates. | PASS — retained evidence. |
batch45-grok-4-3-m1-r2900K input | 1M candidate context; 64K output reserve; compaction/retrieval; must-keep anchors | 900K requires compaction; 12K non-must-keep tokens dropped and citations cover 98/100 anchors. | Must-keep evidence may not be dropped. | PASS WITH REPAIR — compaction required. |
batch45-grok-4-3-m1-r31.05M input | 1M envelope; 64K reserve; shard plan; dropped evidence; citation coverage | Single pass is unavailable; shard plan leaves 40K must-keep tokens unassigned. | Overflow cannot be hidden by a broad context label. | FAIL — candidate excluded. |
Batch 45 · M2: Stay/restructure/switch decision ledger
Formula / rule: switch only when restructuring cannot satisfy the declared blocker or a non-model constraint requires departure.
Dated provenance: Frozen Batch 45 grok-4-3 fixture; fits, overflow, measured task, concentration, modality, and operational cases; authoritative evidence and surface verification date 2026-08-14.
First-party citation: xAI API documentation
| Field ID / fixture | Inputs | Observation / calculation | Decision boundary | State |
|---|---|---|---|---|
batch45-grok-4-3-m2-r1fits and passes + context overflow only | source replay; evidence required; action class; invalid shortcut; next canary | Fits-and-passes stays; overflow-only selects retrieval/shards before switching. | Price or recency is not a valid shortcut for restructuring. | PASS — least-disruptive action. |
batch45-grok-4-3-m2-r2measured task failure + provider concentration | task failure rubric; second provider; hard constraint; candidate evidence; canary | Measured failure permits switch; concentration permits cross-provider canary only after host identity joins. | A broad “best” claim cannot replace the declared blocker. | PASS WITH REPAIR — canary scoped. |
batch45-grok-4-3-m2-r3modality gap + operational failure | media fixture; error ledger; restructuring option; rollback trigger; owner | Modality gap cannot be fixed by retrieval; operational failure lacks error settlement. | Unknown operational evidence remains fail-closed. | UNAVAILABLE — no switch recommendation. |
Batch 45 · M3: General-work matched replay
Formula / rule: replay result = source/target fixture hashes + model/mode identity + checker + reviewer outcome.
Dated provenance: Frozen Batch 45 grok-4-3 fixture; document, repository, mixed-media, reasoning, five-tool, and interrupted-stream replays; authoritative evidence and surface verification date 2026-08-14.
First-party citation: All AI Ask evidence ledger
| Field ID / fixture | Inputs | Observation / calculation | Decision boundary | State |
|---|---|---|---|---|
batch45-grok-4-3-m3-r1long-document synthesis + repository navigation | source/target hashes; retained evidence; model/mode; checker; reviewer outcome | Both fixture hashes join; citation checker passes and reviewer accepts with zero repair. | This is workload evidence, not a broad fastest/best claim. | PASS — matched replay. |
batch45-grok-4-3-m3-r2image-plus-text analysis + reasoning problem | image hash; prompt hash; reasoning mode; usage/latency only if observed; reviewer | Image result is candidate-labelled; latency is not recorded because first-event telemetry is absent. | No latency inference from a provider label. | PASS WITH REPAIR — telemetry omitted. |
batch45-grok-4-3-m3-r3five-tool workflow + interrupted stream | tool IDs; event sequence; resume hash; repair count; rollback trigger | Five tools settle; interrupted stream resumes with a duplicate event and rollback trigger is armed. | Duplicate events require review before promotion. | UNAVAILABLE — replay needs repair. |
Fail-closed rule: unresolved identity, host, endpoint, artifact, modality, control, workload, acceptance, or accounting joins remain Unavailable; no neighboring route supplies them.
Run the grok-4-3 evidence canary →What is the closest alternative to Grok 4.3?
Grok 4.6 is the closest match: drop-in migration, +92% price, losing context drops from 1,000,000 to 500,000 tokens.
Can I switch off Grok 4.3 without changing my code?
Within xAI, Grok 4.6 is a drop-in swap — same request shape, just change the model string.
What do I lose switching from Grok 4.3?
Against the closest match, Grok 4.6: Context drops from 1,000,000 to 500,000 tokens.
Prices and specs verified 2026-08-14.