AI Model Comparisons

74 head-to-head matchups and migration guides covering Gemini 3.7 Flash, Grok 4.6, Claude Sonnet 5, DeepSeek V4, Mistral Large 3, and the current model catalog.

New and updated models

Fresh release and pricing decisions, ordered by the latest verified registry updates.

Recently updated

Gemini 3.7 Flash

Release specs, context, tools, and migration choices.

Recently updated

Grok 4.6

Release specs, context, tools, and migration choices.

Recently updated

Claude Sonnet 5

Release specs, context, tools, and migration choices.

Recently updated

DeepSeek V4 Flash

Compare peak/off-peak pricing and thinking-mode trade-offs.

Recently updated

DeepSeek V4 Pro

Compare peak/off-peak pricing and thinking-mode trade-offs.

Recently updated

Mistral Large 3

Open weights, EU deployment, and multimodal API economics.

Head-to-head

Current models compared on price, context window, and capability.

Claude Opus 4.8 vs DeepSeek V4 Pro

Decision dimensions: price, context, tools, and release status.

Claude Opus 4.8 vs Gemini 3.1 Pro

Decision dimensions: price, context, tools, and release status.

Claude Opus 4.8 vs Gemini 3.7 Flash

Decision dimensions: price, context, tools, and release status.

Claude Opus 4.8 vs GPT-5.6 Sol

Decision dimensions: price, context, tools, and release status.

Claude Opus 4.8 vs Grok 4.3

Decision dimensions: price, context, tools, and release status.

Claude Opus 4.8 vs Grok 4.5

Decision dimensions: price, context, tools, and release status.

Claude Opus 4.8 vs Grok 4.6

Decision dimensions: price, context, tools, and release status.

Claude Sonnet 5 vs DeepSeek V4 Pro

Decision dimensions: price, context, tools, and release status.

Claude Sonnet 5 vs Gemini 3.1 Pro

Decision dimensions: price, context, tools, and release status.

Claude Sonnet 5 vs Grok 4.3

Decision dimensions: price, context, tools, and release status.

DeepSeek V4 Pro vs Gemini 3.1 Pro

Decision dimensions: price, context, tools, and release status.

DeepSeek V4 Pro vs Gemini 3.7 Flash

Decision dimensions: price, context, tools, and release status.

DeepSeek V4 Pro vs GPT-5.6 Sol

Decision dimensions: price, context, tools, and release status.

DeepSeek V4 Pro vs Grok 4.3

Decision dimensions: price, context, tools, and release status.

DeepSeek V4 Pro vs Grok 4.5

Decision dimensions: price, context, tools, and release status.

DeepSeek V4 Pro vs Grok 4.6

Decision dimensions: price, context, tools, and release status.

Gemini 3.1 Pro vs GPT-5.6 Sol

Decision dimensions: price, context, tools, and release status.

Gemini 3.1 Pro vs Grok 4.3

Decision dimensions: price, context, tools, and release status.

Gemini 3.1 Pro vs Grok 4.5

Decision dimensions: price, context, tools, and release status.

Gemini 3.1 Pro vs Grok 4.6

Decision dimensions: price, context, tools, and release status.

Gemini 3.7 Flash vs Grok 4.3

Decision dimensions: price, context, tools, and release status.

GPT-5.6 Sol vs Grok 4.3

Decision dimensions: price, context, tools, and release status.

Claude Haiku 4.5 vs DeepSeek V4 Pro

Decision dimensions: price, context, tools, and release status.

Claude Haiku 4.5 vs Gemini 3.1 Pro

Decision dimensions: price, context, tools, and release status.

Claude Haiku 4.5 vs Grok 4.3

Decision dimensions: price, context, tools, and release status.

Claude Opus 4.8 vs Gemini 3.6 Flash

Decision dimensions: price, context, tools, and release status.

Claude Opus 4.8 vs GLM-5.2

Decision dimensions: price, context, tools, and release status.

Claude Opus 4.8 vs GPT-5.6 Luna

Decision dimensions: price, context, tools, and release status.

Claude Opus 4.8 vs GPT-5.6 Terra

Decision dimensions: price, context, tools, and release status.

Claude Opus 4.8 vs Grok-4.20 Reasoning

Decision dimensions: price, context, tools, and release status.

Claude Opus 4.8 vs Muse Spark 1.3

Decision dimensions: price, context, tools, and release status.

Claude Opus 4.8 vs Qwen 3.8 Max

Decision dimensions: price, context, tools, and release status.

Claude Sonnet 4.6 vs DeepSeek V4 Pro

Decision dimensions: price, context, tools, and release status.

DeepSeek V4 Pro vs Mistral Large 3

Decision dimensions: price, context, tools, and release status.

Claude Fable 5 vs GPT-5.6 Sol

Decision dimensions: price, context, tools, and release status.

Claude Sonnet 5 vs Mistral Large 3

Decision dimensions: price, context, tools, and release status.

Migration guides

Still on an older model? See how it stacks up against its current successor.

Migration Guide

Claude Opus 4 → Claude Opus 4.8

Should you upgrade? Compare price, context, and capability changes.

Migration Guide

Grok-3 → Grok 4.3

Should you upgrade? Compare price, context, and capability changes.

Migration Guide

GPT-4o → GPT-5.6 Sol

Should you upgrade? Compare price, context, and capability changes.

Migration Guide

Claude Sonnet 4.5 → Claude Sonnet 4.6

Should you upgrade? Compare price, context, and capability changes.

Migration Guide

Claude Sonnet 4 → Claude Sonnet 4.6

Should you upgrade? Compare price, context, and capability changes.

Migration Guide

Gemini 2.5 Flash → Gemini 3.6 Flash

Should you upgrade? Compare price, context, and capability changes.

Migration Guide

GPT-4 Turbo → GPT-5.6 Terra

Should you upgrade? Compare price, context, and capability changes.

Migration Guide

GPT-4o Mini → GPT-5.6 Luna

Should you upgrade? Compare price, context, and capability changes.

Migration Guide

GLM-5.1 → GLM-5.2

Should you upgrade? Compare price, context, and capability changes.

Migration Guide

Gemini 2.5 Flash Lite → Gemini 3.5 Flash Lite

Should you upgrade? Compare price, context, and capability changes.

Best AI for X

Task-based rankings — which model to use for what, with a published formula.

Best LLM for Every Task

10 task pages — coding, writing, math, agents, RAG, and more — ranked on price, speed, context, and graded accuracy where we have it.

Fastest AI Models for Real-Time Apps — TTFT vs Throughput

Choose an AI model for chat, autocomplete, and agent loops by comparing measured time to first token, throughput, and speed trade-offs.

Cheapest AI APIs 2026 — API Cost Comparison & ROI

Compare API pricing for major LLMs. Discover the most cost-effective AI models for your business, coding, and writing workflows.

API capability comparisons

Cross-provider contract evidence for retention, regions, quotas, context, structured output, tools, and batch jobs.

LLM API Data Retention Compared — Training Use and ZDR by Provider

Compare documented LLM API prompt and output retention, training use, human review, feature exceptions, and zero-data-retention eligibility by exact service, account, and endpoint.

LLM API Regions and Data Residency Compared

Compare where exact LLM API routes document inference, storage, control-plane, logging, support, and data-zone locations without treating a regional URL as residency proof.

LLM API Rate Limits Compared — RPM, TPM, Concurrency, and Capacity

Compare documented LLM API quotas across RPM, input and output TPM, daily requests, concurrency, and batch queues on fixed unit-compatible workloads.

LLM Context Window Comparison — Input, Output, and Usable Token Limits

Compare documented LLM context and output envelopes by exact model, snapshot, host, surface, tokenizer evidence, reserves, aliases, and dated limit changes.

LLM Structured Output Compared — JSON Mode and JSON Schema by API

Compare JSON mode, strict JSON Schema, tool-argument schemas, streaming, refusal, truncation, and validator-backed conformance across LLM API surfaces.

LLM Function Calling Compared — Tool Schemas, Results, and Retry Safety

Compare LLM API tool declarations, calls, results, parallelism, continuation, cancellation, and side-effect-safe retry semantics by exact surface and model.

LLM Batch APIs Compared — OpenAI, Anthropic, Gemini, and More

Compare asynchronous LLM batch formats, eligibility, limits, completion, expiry, cancellation, result ordering, failures, and usage reconciliation for fixed jobs.

Provider ladders

Compare tiers within the same provider's lineup.

Provider Ladder

Claude Fable 5 vs Claude Opus 4.8

Which tier is worth the upgrade?

Provider Ladder

Claude Opus 4.8 vs Claude Sonnet 5

Which tier is worth the upgrade?

Provider Ladder

Claude Opus 4.8 vs Claude Sonnet 4.6

Which tier is worth the upgrade?

Provider Ladder

DeepSeek V4 Flash vs DeepSeek V4 Pro

Which tier is worth the upgrade?

Provider Ladder

Gemini 3.1 Pro vs Gemini 3.6 Flash

Which tier is worth the upgrade?

Provider Ladder

Grok-4.20 Reasoning vs Grok 4.3

Which tier is worth the upgrade?

Provider Ladder

Claude Fable 5 vs Claude Sonnet 5

Which tier is worth the upgrade?

Provider Ladder

Claude Sonnet 4.6 vs Claude Sonnet 5

Which tier is worth the upgrade?

Provider Ladder

Gemini 3.6 Flash vs Gemini 3.7 Flash

Which tier is worth the upgrade?

Provider Ladder

GPT-5.6 Sol vs GPT-5.6 Terra

Which tier is worth the upgrade?

Provider Ladder

Mistral Large 3 vs Mistral Medium 3

Which tier is worth the upgrade?

Provider Ladder

Claude Haiku 4.5 vs Claude Sonnet 4.6

Which tier is worth the upgrade?

Provider Ladder

GPT-5.6 Luna vs GPT-5.6 Terra

Which tier is worth the upgrade?

Provider Ladder

Amazon Nova Lite vs Amazon Nova Pro

Which tier is worth the upgrade?

Classic matchups

Our original head-to-head comparisons, kept for the search volume they hold.

GPT-4o vs Claude Sonnet — The Ultimate Head-to-Head Comparison

Compare GPT-4o and Claude Sonnet side-by-side. Discover differences in speed, reasoning, coding, writing, and pricing to choose the best model.

Gemini 2.5 vs ChatGPT (GPT-4o) — Battle of the Titans

Gemini 2.5 vs ChatGPT (GPT-4o). Compare speed, multimodal accuracy, search capabilities, and ecosystem features side-by-side.

DeepSeek V3 vs GPT-4o — Open Weight Challenger vs Market Leader

DeepSeek V3 vs GPT-4o compared on reasoning, coding, pricing, and context window. Find out if the open-weight challenger beats OpenAI's flagship.

Claude 3.5 Sonnet vs Gemini 1.5 Pro — Reasoning vs Context Length

Claude 3.5 Sonnet vs Gemini 1.5 Pro compared on coding, reasoning, context window, and pricing to help you pick the right model.

Grok 2 vs GPT-4o — xAI's Challenger Takes on the Market Leader

Grok 2 vs GPT-4o compared on reasoning, real-time knowledge, coding, and pricing. See which model fits your workflow best.

Batch 39 · server-rendered decision evidence · verified 2026-08-27

Canonical comparison discovery and evidence coverage

Every field is tied to a frozen input and a dated provenance record. Unsupported facts fail closed as Unavailable; they are not treated as zero, free, equivalent, current, fastest, cheapest, private, or passing.

Canonical-intent decision router

Formula / rubric: Owner route = one canonical destination matching intent; sibling routes are listed as exclusions, not alternate verdicts.

Provenance: Frozen query intents and route ownership reviewed 2026-08-27. Unsupported fields fail closed as Unavailable.

Frozen fixture / run	Visible inputs	Field-level result	Decision boundary	State / reproducible bill
named pair `batch39-compare-m1-r1`	“GPT-4o vs Claude” + exact model names	owner /compare/gpt-4o-vs-claude; sibling provider pages excluded.	Open the pair page only after identities are pinned.	ROUTED — named pair.
fastest `batch39-compare-m1-r2`	“fastest AI model” + latency/SLO constraint	owner /compare/fastest-ai-models; /benchmarks retains raw data.	Do not use raw leaderboard as workload verdict.	ROUTED — speed decision.
arbitrary cost `batch39-compare-m1-r3`	“LLM cost calculator” + retrieval/tools/retry components	owner /llm-cost-calculator; specialist children own non-token mechanics.	Hub routes; it does not declare cheapest-qualified winner.	ROUTED — calculator.

Module citations: All AI Ask comparison directory. All AI Ask evidence registry (verified 2026-08-27).

Server-rendered evidence-coverage matrix

Formula / rubric: Coverage count = dated price + speed + specification + matched-run + lifecycle + provider-policy evidence; oldest deciding source determines freshness.

Provenance: Comparison families audited from first-party registry and run records on 2026-08-27. Unsupported fields fail closed as Unavailable.

Frozen fixture / run	Visible inputs	Field-level result	Decision boundary	State / reproducible bill
GPT-4o vs Claude `batch39-compare-m2-r1`	price 2/2; speed 2/2; specs 2/2; matched run 2/2; lifecycle 2/2	oldest deciding source 2026-08-13; status current for pinned IDs.	All deciding fields must be dated and identity-compatible.	COVERED — see pinned pair.
Gemini vs ChatGPT products `batch39-compare-m2-r2`	price 0/2; speed 0/2; specs 2/2; matched workflow 1/2; policy 0/2	oldest product evidence 2026-08-27; status partial.	No product winner from API price or model specs.	PARTIAL — product evidence bounded.
unsupported pair gap `batch39-compare-m2-r3`	price 0/2; speed 0/2; specs 1/2; matched run 0/2; lifecycle 0/2	coverage is Unavailable — not sufficient for a pair verdict	Directory links an adjacent supported route only.	Unavailable — not sufficient for a pair verdict

Module citations: All AI Ask model registry. All AI Ask evidence registry (verified 2026-08-27).

Comparison-gap register

Formula / rubric: Gap record = demanded intent + required evidence + future owner + noindex/no-route status; gap rows never create indexable URLs.

Provenance: Fresh exact-intent SERP review 2026-08-27; monthly volume remains unavailable where not measured. Unsupported fields fail closed as Unavailable.

Frozen fixture / run	Visible inputs	Field-level result	Decision boundary	State / reproducible bill
model pair gap `batch39-compare-m3-r1`	demanded pair; exact IDs unknown; SERP presence only	required: exact IDs, dated price, matched run; future owner pair page.	No URL is published until evidence contract closes.	QUEUED — noindex/no-route.
task gap `batch39-compare-m3-r2`	demanded task; acceptance rubric absent; related task route exists	required: frozen fixture, checker, and cost denominator; future owner task page.	Route to adjacent task page without inventing a verdict.	Unavailable — acceptance rubric absent
provider gap `batch39-compare-m3-r3`	demanded provider family; policy source stale; volume unavailable	required: current policy and dated rate registry; future owner provider page.	Gap remains visible; no thin canonical is created.	Unavailable — current policy and dated rate registry are absent

Module citations: All AI Ask route directory. All AI Ask evidence registry (verified 2026-08-27).

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